Canada's Milos Raonic pounded 17 aces to end the winning run of second seeded and Commonwealth gold medallist Somdev Devvarman and create the biggest upset of the day in the $1,25,000 Tashkent Challenger, on Thursday. The 155-ranked Raonic beat the 95th ranked Somdev 6-4, 7-6(3) in an hour and 18 minutes.