Irishman Paul McGinley has conceded that his injured knee will prevent him from teeing up in this week's PGA Championship at Wentworth.
McGinley hopes to play in next week's Wales Open
McGinley, 39, had knee surgery last week after pulling out of the Irish Open at Carton House.
The Dubliner played nine practice holes on Wednesday but said the pain of walking was too much.
"I nearly made it, but I am fully confident I will be back next week," said McGinley.
"Although I had no problem hitting shots or twisting and turning, the problem came walking between shots.
"It's less than a week since surgery and my knee started to swell.
"It's disappointing to miss such a marvellous tournament, but the risk was too great."
He is now targeting next week's Wales Open at the earliest, or failing that the US Open on 15-18 June.
McGinley, who sank the winning putt in the 2002 Ryder Cup, started having knee problems as a 19-year-old when he broke his left knee-cap playing gaelic football, an injury that turned him towards golf.
The two-time Ryder Cup star lies seventh in Europe's ranking table with the top 10 by 3 September qualifying automatically.
The biennial match against the USA takes place at the K Club, Ireland, from 22-24 September.