Roger Federer, Bill Gates to team up in charity tennis match
Eighteen-time Grand Slam winner Roger Federer and Microsoft co-founder Bill Gates will team up for a one-set charity tennis match in Seattle, USA, on April 29. Federer and Gates will play US' John Isner, who won the longest match in the sport's history. The proceeds from the match will go to Federer's trust to support children's education in Africa.