Federer, who beat Russia’s Mikhail Youzhny in yesterday’s semis, was seeking to win his 6th title at this Wimbledon warm-up event.
But Haas, playing some fine grass court tennis, rallied back from 1-3 down in the first set, prevailing in a tiebreak to take a lead in the match.
Federer wasn’t able to shift momentum as he failed to convert any of the two break points he had in the second game of the second set. He paid dearly for it as Haas took his serve in the 9th game, just before serving out the match to the huge delight of the home crowd.
“I should never have lost the first set. So, obviously that hurt,” said Federer after the match. “He got momentum after that. He started to serve a bit better. He was aggressive, he was maybe the more inspired player out there today. And that’s why he deserved to win.”