Justin Rose has emerged as an injury doubt for this week's European Tour flagship BMW PGA Championship at Wentworth due to a knee injury.
Rose cancelled a scheduled interview on Tuesday and has also withdrawn from Wednesday's pre-tournament pro-am, although the 39-year-old hopes to be fit enough to join nine of his Ryder Cup team-mates in the field.
"Last Thursday I slipped and jarred my knee," the world number four said in a statement.
"Since then I have been getting treatment on the injury and I have been working hard with Justin Buckthorp and my medical team away from the course in order to ensure I am able to play in this week's BMW PGA Championship at Wentworth.
"Unfortunately, I have had to withdraw from Wednesday's pro-am as a precaution, but I am doing everything I can to be fit to play on Thursday."
Rose was 12th on his last appearance at Wentworth in 2017 and has twice finished runner-up in one of the European Tour's flagship events.