Roger Federer lost to Russian Evgeny Donskoy of Russia

In the biggest upset of the tournament, 18-time Grand Slam winner Roger Federer lost 6-3 6-7 6-7 to world number 116 Evgeny Donskoy of Russia in the second round of the Dubai Duty Free Tennis Championships on Wednesday.

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Federer was leading 5-2 in the second set tie-break against Donskoy who came through the qualifying round in Dubai.