David Goffin rallied in the semifinals on Saturday to claim the biggest win of his career and stun the favorite 2-6, 6-3, 6-4.
“It is the best win of my career, for sure,” said Goffin, who lost all six of his previous encounters against Federer.
“I started to feel the ball better at the end of the first set, so I wanted to be more aggressive. It paid off. I started to serve well. My forehand was going much better.
Roger Federer says he is “extremely happy” with “an amazing year”, despite it ending on a low note at the ATP Finals.
It’s been an amazing year for me,” he reflected. “(I’ve) been so happy that I was playing at this level from the beginning until basically the end.
“So it’s been great. (I’ve) really enjoyed myself in the process.
“It’s kind of disappointing to finish on this note. But whatever happened today is less important than if I look at the entire season. With that season, I’m extremely happy.”
Grigor Dimitrov defeated Jack Sock 4-6, 6-0, 6-3 and will face David Goffin in finals.