Serena Williams represents the United States' best chance to hoist the French Open trophy this year but questions loom about her fitness after she was forced to withdraw from the Italian Open last week with a knee injury.

Williams, 37, who is seeded 10th and has played only nine matches this year, would not have to face a seeded player until the third round.

Serena Williams' husband wants to learn how to do their daughter's hair – and Twitter is here for him

They can't last forever - but here's a list of six sportspeople we definitely will not be ready to say goodbye to when the time comes.