World tennis No.2 Roger Federer has been eliminated from the Paris Masters after falling to a third-round loss against big-serving American John Isner.
Isner won the match 7-6 3-6 7-6.
Isner, who fired down 27 aces, ended the contest on his fourth match point with a service winner.
"It's tough to get out of the tournament not having lost your serve but that's how it can go against John," the former world No.1 told reporters.
"At the very end of the season, going two tournaments in a row after playing a lot of tennis in Basel the week before... there's maybe a bit of a letdown after Basel."
Federer's defeat was the first upset at Bercy after world No.1 Novak Djokovic and second seed Andy Murray advanced.