They can now be considered one of Europe's best teams. Their La Liga title two years ago was proof of that and their consistent improvement and investment since then has ensured they are not going anywhere soon. Following last year's unsuccessful attempt to break the top two in Spain, this season has started much better. Here are the player ratings for each player who has played a significant amount of time.
Jan Oblak - 9
One of the finest goalkeepers in Europe this season. Diego Simeone's defense has improved with the emergence of Jose Gimenez and Diego Godin as a centre-half pairing to be reckoned with, along with the return of Filipe Luis and the consistency of Juanfran, but how much of this is down to the confidence instilled in them by Oblak? He has 10 clean sheets in 17 appearances and continues to impress between the posts for Atletico. Not as physically dominant as Thibaut Courtois but more athletically reliant, which is a fair trade-off. Still only 22 with improvement almost a weekly occurrence. Keeping him at the Calderon will become the biggest problem facing Atletico's board in the coming transfer windows.
Filipe Luis - 7
Filipe Luis' confidence took a battering at Chelsea and it was evident in his first few weeks and months back in an Atletico Madrid jersey. The confidence Simeone has in Filipe Luis has been repaid and he slowly worked his way back up to the high standard he is capable of. He never was an explosive left-back, but combines with wide left midfielders well and is growing a good understanding of Simeone's evolved midfield and attack since his return. He has been adjusting to Yannick Ferreira Carrasco and the changing Atletico midfield and is poised for another step forward in 2016.
Jose Gimenez - 7.5
Gimenez made an awful gaffe against Deportivo la Coruna that resulted in a late equaliser, which was one of the only blots on his start to the 2015-16 season. It was a big enough mistake, however, to result in his benching for a game following the draw. He is still only 20 and is only getting started but can still be a little rash in his play. He is constantly learning from Diego Godin and the nuances of the game, but being an aggressive centre-half, there will always be a risk. Will certainly improve in 2016 and has been solid to start the season.
Diego Godin - 9
Godin is the heartbeat of Atletico's defense. He has been immense yet again during the first half of the season and has proven time and time again that he is Atletico to the bone. I'm not quite sure what else to say but the greatest compliment you can give Godin is that without him, Atletico's defense would be nowhere near how good it is with him.
Juanfran - 8.5
One of the most underrated right-backs in the world of football. Similar to Filipe Luis on the other side, he balances getting forward with his defensive responsibility. A lot to be said about his delivery from the right hand side and with a more potent and in-form strike force, he could very well be leading the assist stats in La Liga.
Gabi - 7.5
Gabi has been decent this season alongside Tiago in Atletico's pivot position. He has been a little bit exposed without Tiago in the team and might soon lose his place in the side, however. The main reason Gabi is there is to guide and his red card against Malaga was a mistake saturated in inexperience. Atletico have purchased Matias Kranevitter and Augusto Fernandez and it might be time that Gabi was only used sparingly and in games where his strong personality and influence is needed.
Tiago - 8.5
Tiago was having a sensational season prior to breaking his right tibia in a freak accident against Espanyol. Atletico have had to dip into the transfer market in order to purchase Augusto Fernandez and have had to rearrange a lot of their midfield settings in order to replace and compensate for Tiago's loss. The security he gave Atletico's defense was second to none and he was reading the game as well as he ever had. Similar to a fine wine, Tiago was getting better the longer he sat in front of Atletico's defense.
Koke - 8
Koke's significance was felt when he missed three games in September with a thigh muscle issue. They lost one and drew one of the three games he was missing for. The 23-year-old has shifted roles since Tiago Mendes' injury and has two assists since then in a more central role. Koke needs to find a way to influence games more, however, given his potential and ability. His dedication to helping the team is admirable and remains a vital clog in Diego Simeone's machine.
Oliver - 7
As most youngsters do, Oliver has struggled to find consistency in his game. Too often, Simeone has opted for a more defensive option in place of Oliver and that will always hurt his minutes and influence on the side. There is little doubt that Oliver will turn into a fine player but in order to stamp his authority at Atletico Madrid, he will need to offer more going backwards as he does when going forward. He just turned 21 and is certainly the next wave of Spanish and Atletico players to take on the world but at the moment, Simeone is working hard to turn him into more of a complete player. He may need to go through the same evolution as Koke did, with the latter having moved from the right to the centre and offering a versatile option in the middle. Very good and will improve in the new year.
Saul - 7.5
Given a huge chance to shine in the absence of Tiago Mendes and has really grabbed it. He will continue to grow into his role within the team and, while he is a different player to Tiago, has shown Simeone and Atletico fans what life after the Portuguese midfielder will be like. Offers an attacking presence that Gabi and Tiago don't and has been growing in confidence. It was only a matter of time for the youngster who is right at the heart of Atletico's next generation of stars.
Griezmann - 9
What else can we say? Griezmann has become the superstar of the team. Highly sought after and understandably so, the rumours will not stop. While Griezmann is the superstar in the team, he does his utmost to blend right in, offering himself up in defensive situations and never compromising his love for the team when speculation begins to mount. One of Europe's top 5 players at the moment and world class in everything he does.
Carrasco - 8
One of the least spoken about transfers of the summer but has shown his importance to the team time and time again. Can sometimes offer himself as a one-man counter-attacking juggernaut. The Belgian has shown his speed and incision often and while his finishing and end product could improve, having Griezmann on the opposite side mean he just needs to be a distraction. Again, only turned 22 and is certainly proving himself to be an excellent addition to Simeone's team.
Jackson Martinez - 6.5
Jackson has struggled to make an impression at Atletico Madrid. At Porto, the Colombian was a goal scoring machine, landing 92 in 133 games, but has only scored twice in 12 games for Atletico. Something has to change and Jackson understands this. Chelsea have been linked but Simeone loves the player and it is not for the lack of trying that Jackson has struggled. A run of goals will change opinion about him and he has shown his willingness to adapt. Patience could be a virtue here but in modern football, it so rarely is.
Fernando Torres - 7
While you could be harsh on Torres, he does do a job for Atletico and seems to understand his role. He has been struggling with the weight of finding his 100th goal for the club and it seems to be playing on his mind. It goes without saying that he is not the player he once was but still fights whenever Simeone thrusts him into action. Possibly being asked to do too much given Jackson's struggles but once Simeone finds his first choice striker, Torres will become the impact sub that his profile fits. Still works tirelessly.
Luciano Vietto - 7
Appears to be struggling to identify himself as a first choice option for Simeone. He offers something different than Jackson and Fernando Torres and does tend to combine well with the likes of Griezmann, Oliver Torres et al but does not have the goals to back up a claim to be picked first. As the season continues, the chances might become more frequent but will need to become more physically dominant before that happens.
Angel Correa - 8
Correa has had a fine input any time he has made the field but has failed to start more than two games in the league. He has only played 396 minutes but scored one of the most important goals of this season with his effort against Rayo Vallecano. He broke into the Argentinian team this year and is set for big things but will have to bide his time at Atletico. Correa could have the most potential out of all the youngsters at Atletico and that has been evident when given chances by Cholo.