Germany's Tommy Haas is unlikely to be fit in time for the Paris Masters next week after contracting swine flu.
The 31-year-old pulled out of the Stockholm Open and will also miss this week's Swiss Indoors in Basle after he was diagnosed with the highly-contagious H1N1 strain.
"I did a test because I suspected I had the swine flu and the test was positive," he told the Bild newspaper. "It was obviously a shock for me.
"It was really bad for three days and I couldn't leave my hotel room. I felt really bad."
The Wimbledon semi-finalist is confident of making a swift recovery even though the season is virtually over.
"I am quite relaxed because I know that swine flu is a particularly strong form of flu, but when you are in a good physical condition like I am, then you can quickly beat it off," he added.
Read what Sky Sports' experts and bloggers have been talking about over the last seven days in sport...
Who are the champs and the chumps of the sporting week? skysports.com takes you through it.
After his second successive final defeat, will Andy Murray ever land a Grand Slam title? It's Your View...