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The loss dents the Swiss great's bid for a 100th title in his illustrious career

ATP Finals: Federer stunned by Nishikori in opener, Anderson beats Thiem

ATP Finals: Roger Federer made 34 unforced errors and fell flat against Japan Kei Nishikori 6-7(4), 3-6 while Kevin Anderson won 6-3, 7-6(10) against Dominic Thiem.

Federer's ATP Finals tilt takes a big hit

Kei Nishikori and Kevin Anderson have made winning starts at the ATP Finals with group wins over Roger Federer and Dominic Thiem respectively.

Federer falls flat against Nishikori, Anderson off to flyer

LONDON: Roger Federer was handed the Sunday night prime time slot for the opening match of his 16th ATP Finals but fluffed his lines in an ...

Roger Federer pays for an error-strewn performance as his opening group match at the ATP Finals ends in defeat by Kei Nishikori.

Kei Nishikori produced a huge upset at the ATP Finals on Sunday with a straight-sets victory over a below-par Roger Federer.Nishikori came into his opening match of the round-robin stage having not

Kei Nishikori reacts to stunning ATP Finals victory over Roger Federer

Kei Nishikori said he was pleased to beat his 'idol' after stunning Roger Federer at the ATP Finals. The Japan star defeated Federer 7-6 (7-4) 6-3 in less than 90...

ROGER FEDERER says he is 'angry' after suffering a shock 7-6(4), 6-3 defeat to Kei Nishikori at the ATP Finals.

Angry Roger Federer suffers shock defeat to Kei Nishikori in ATP Finals opener

Roger Federer's hopes of winning a seventh ATP Finals title were dealt a major blow after he suffered a shock defeat to Kei Nishikori. The 20-time Grand Slam champion was...