WIMBLEDON, England (AP) Until about a week ago, even Chris Eubanks did not really believe he was capable of this sort of thing of beating the worlds best tennis players at Wimbledon , of reaching the quarterfinals at any Grand Slam tournament , of winning match after match after match on grass courts.

I would show up to tour events saying, Oh, can I get through a couple rounds of here? he said during an interview the day before play began at the All England Club. Now I genuinely can say, probably for the first time, Im showing up to tournaments with higher expectations and really wanting to do well and put my best foot forward. Im no longer feeling OK just being there. I know that I belong.

Does he ever.

Eubanks, a 6-foot-7, big-serving American making his Wimbledon debut at age 27 right after claiming the first ATP title of his career, reached the quarterfinals at a major for the first time by stunning two-time Slam runner-up Stefanos Tsitsipas 3-6, 7-6 (4), 3-6, 6-4, 6-4 in a little over three hours on Monday.