4 top seeds reach last 4

Two-time defending champion Milos Raonic rolled to a straight set quarterfinal victory 7-6 (7/0), 6-3 over Denis Istomin at the ATP Tour's SAP Open on Friday night.
The 22-year-old Raonic hammered 14 aces and needed just 80 minutes to oust Istomin in a rematch of last year's final which was also won by the Canadian.
Raonic, who is seeded No. 1 for the first time at an ATP event in his career, advances to the semifinals where he will face third seeded American Sam Querrey who needed three sets to eliminate Alejandro Falla of Colombia 6-3, 4-6, 7-5.
All four top seeds are through to the semifinals as US second seed John Isner and German fourth seed Tommy Haas also advanced Friday with straight-set wins.