Martin Lee has pinpointed the lapse which wrecked his hopes of Wimbledon glory.
The Worthing star was on course to reach the third round for the first time when he took the first set off tall Moroccan Younes El Aynaoui.
But he was then broken to love in the opening game of the second set and went on to lose 6-7, 6-2, 6-2, 6-2.
"I think the turning point was the first game of the second set, when I lost my serve," said Lee.
"I was telling myself in the changeover that it was an important game.
"I didn't get enough first serves in, I gave him a chance and that is where the momentum of the match changed.
"It gave him a big lift. If I had put the pressure on there he might have folded.
"It was disappointing, especially after the first set. I could have kept it going more and made the match closer."
Lee's consolation is a cheque for £11,700 after eclipsing Costa Rican No.1 Juan Antonio Marin in the first round on Monday.
The 22-year-old left hander, sidelined for five months by a groin problem, added: "I have been pleased with my game in the last four weeks.
"It has come on a lot, especially since the injury.
"I am going to work even harder to get my game up to his (Aynaoui) level for the whole match."
Lee will now play challenger events in Bristol and Brazil before trying to qualify for the US Open.
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