Result: Stanislas Wawrinka edges Ivo Karlovic in hard-fought clash

Switzerland's Stanislas Wawrinka serves against Serbia's Novak Djokovic during their men's final match of the Roland Garros 2015 French Tennis Open in Paris on June 7, 2015
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Stanislas Wawrinka squeaks into the quarter-finals of the Cincinnati Open after a hard-fought match against Ivo Karlovic that saw all three sets go to tie-breaks.

Stanislas Wawrinka has reached the quarter-finals of the Cincinnati Open after a hard-fought match against Ivo Karlovic that saw all three sets go to tie-breaks.

The giant Croat drew first blood after a tight first set in which neither player broke serve, coming off best in the tie-break with a tally of 7-2.

Both were also just as evenly matched in the second set, but this time the Swiss veteran came out on top with a narrow tally of 7-5 in the tie-break.

With all to play for in the third set, Karlovic once again took his opponent right to the end, but Wawrinka edged it in the tie-break to seal a narrow 6-7(2) 7-6(5) 7-6(5) victory after a gargantuan match lasting nearly three hours.

Stanislas Wawrinka of Switzerland celebrates victory in his Gentlemen's Singles Fourth Round match against David Goffin of Belgium during day seven of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club on July 6, 2015
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