Serena Williams, the most successful female player of the Open era, is pregnant - just 12 weeks after winning her record 23rd Grand Slam.
World number two Novak Djokovic won on his return to the tour as he beat France's Gilles Simon in his opening match of the Monte Carlo Masters.
Chelsea boss Antonio Conte said he took responsibility for failing to motivate his side in Sunday's defeat by Manchester United.
Former Chelsea and Ivory Coast striker Didier Drogba has joined United Soccer League side Phoenix Rising as a player and co-owner.
"Shocked" Borussia Dortmund players will "pull together" when they face Monaco, 24 hours after their team bus was damaged by explosions in Germany.