Stan Wawrinka in Dubai yesterday. Pic/AFP

Dubai: Holder Stan Wawrinka was sensationally dumped out of the Dubai Tennis Championships yesterday as his form collapsed following an early 4-1 lead. The Swiss three-time Grand Slam winner was beaten 7-6 (7/4), 6-3 in the first round by outsider Damir Dzumhur. Wawrinka was playing for the first time since suffering a right knee injury at the Australian Open a month ago, where he reached his eighth major semi-final.