Novak Djokovic concedes Rafael Nadal is the favourite to win the French Open, which gets underway at Roland Garros on Sunday.
Andy Murray has all but ruled out playing singles at Wimbledon this year.
Maria Sharapova has withdrawn from the French Open due to a long-standing shoulder problem.
Serena Williams has withdrawn from the Italian Open with a knee injury but is confident of being fit for the French Open.
From bad boy to elder statesman, Jimmy Connors was one of those players who delighted and shocked in equal measure.