Tennis - Federer humbled by world number 114 in Hamburg

Roger Federer fell to a shock 7-6(7) 7-6(4) defeat to world number 114 Federico Delbonis in the semi-finals of ATP Hamburg.

Tennis - Federer to continue new racquet experiment

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Roger Federer serves during the semi-final match against Argentina's Delbonis at the 2013 International German Open at Am Rothenbaum in Hamburg, Germany, on July 20, 201 (AFP)

Federer, who is debuting a new larger racquet, has struggled throughout the tournament and took three sets to beat home hope Florian Mayer in the quarter-finals.

However, Federer’s loss marks another defeat to a player outside the top 110 in the world following his surprise loss at the hands of Sergiy Stakhovsky at Wimbledon.

The Swiss, a four-time Hamburg winner, made a raft of unforced errors to offer the qualifier a route to his first career final.

For Delbonis, a final awaits against in-form Fabio Fognini, who beat third-seed Nicolas Almagro 6-4 7-6(1) in one hour and 50 minutes.

The win ensures a successive final appearance following on from last week’s win against Philipp Kohlschreiber at ATP Stuttgart - his first career title.

ATP Hamburg semi-final results

Federico Delbonis (Argentina) beat 1-Roger Federer (Switzerland) 7-6(7) 7-6(4)

12-Fabio Fognini (Italy) beat 3-Nicolas Almagro (Spain) 6-4 7-6(1)

ATP Bogota semi-final results

Alejandro Falla (Colombia) beat Vasek Pospisil (Canada) 6-7(4) 6-3 6-4

Ivo Karlovic (Croatia) beat 2-Kevin Anderson (South Africa) 6-4 6-7(4) 6-3

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