13. Tennis ball, with Roger Federer's holographic signature, signed on the occasion of the Australian Open 2011

Throughout his career, Federer has held the position of world leader for 310 weeks and has won 20 Grand Slam titles, six of them at the Australian Open. In 2011, Roger Federer was the defending champion, but he lost in the semi-finals to Djokovic. With his victory in the quarterfinals against Stanislas Wawrinka, Federer broke Jack Crawford's record for the most victories at the Australian Open.

PROVENANCE

E.B.'s sports collection.

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