Tim Henman resumes his chase for a spot in the season-ending Masters Cup at the Swiss Indoors in Basel this week after getting to the root of a health scare. The 30-year-old British number one crashed out of the Madrid Open last week after complaining of fatigue.
"My blood tests showed that I need to top up my magnesium levels, that was why I wasn't feeling my best," Henman explained on his website.
"I'm relieved it's nothing serious and it's nice to be back in Basel."
The 30-year-old will now take a course of magnesium tablets for a month to boost his fitness levels.
Henman, seeded second in Basel, will face France's Anthony Dupuis in the first round on Wednesday.
World number one Roger Federer is seeded top for his hometown tournament and takes on Peru's Luis Horna on Tuesday.
Henman needs a strong display in Basel, where he won in 1998 and 2001, to revive his hopes of reaching the Masters Cup. The Briton was leapfrogged by Russian Marat Safin after his victory in Madrid on Sunday.
But Henman is confident he can improve his points total in Switzerland before going on to Paris, where he aims to defend his title.
"Even though I'm in seventh place, I'm still in a qualifying spot," said Henman.
"And I feel like I'm in a strong position with two weeks to go."
Only the top seven in the Champions Race are certain of making the elite eight-man field in Houston.
MMIX
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