Novak Djokovic claimed his sixth Paris Masters title on Sunday, overcoming Daniil Medvedev and gaining revenge for his defeat in the US Open final in the process.
Prior to this week's Masters 1000 event, Djokovic had not played since going down 6-4 6-4 6-4 to world number two Medvedev at Flushing Meadows in September.
That defeat ended Djokovic's hopes of sealing a calendar Grand Slam, but he was in fine form this week as he regained the title he last won in 2019, having not played in the competition last year.
Defending champion Medvedev started the final brilliantly, but Djokovic rallied to win 4-6 6-3 6-3, claiming a record-setting 37th Masters title in the process.
And the world number one explained how he learned from the mistakes he made in New York to prevail this time around, taking his head-to-head record with Medvedev to 6-4 in the process.
"I went back and reviewed the final of the US Open to see what I did wrong and what I did right," Djokovic told the Tennis Channel.
"I tried to read the patterns of his serve and the ball toss, maybe. I tried to look for the small details, because it was a match of small margins."
Reflecting on the showdown in Paris, Djokovic added: "He started better, broke my serve in the first game and I came back. He served the first set out pretty comfortably, but I felt as if I was there.
"I thought it was only a matter of time when I was going to read his serve better and start to make some plays.
"You can't go through him. You have to find a way to play with controlled aggression, play the right shots at the right time and make him come in. It's variety that wins matches against him. We both suffered on the court and there was a lot of gruelling rallies."
Djokovic, who had already secured a record seventh year-end number one, has won 49 matches in 2021, losing on just six occasions.