Roger Federer
2013: Injury struggles and fall in rankings

Federer developed back injuries in March and July and his ranking dropped from No. 2 to No. 6. Federer's first and only title of 2013 came at the Gerry Weber Open, defeating Mikhail Youzhny in the final. With the victory in Halle, he tied John McEnroe for the third-most ATP titles won by a male player in the Open Era. Federer, however, was unable to maintain his form into Wimbledon, suffering his worst Grand Slam tournament defeat since 2003 in the second round against Sergiy Stakhovsky. This loss ended Federer's record streak of 36 consecutive quarterfinals at Grand Slam tournaments, and it also meant that he would drop out of the top 4 for the first time since July 2003.

After Wimbledon, Federer continued to be upset early in tournaments in Hamburg and Gstaad because of a serious back injury through October, when he announced that he was parting ways with Paul Annacone, his coach for the last three years. Federer made the final in Basel, succumbing to Juan Martín del Potro in three sets, and indicated it was a mistake to have played certain tournaments while suffering from a back injury.

On 27 December 2013, Federer announced that Stefan Edberg was joining his team as co-coach with Severin Lüthi.
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