The second seeded Serb came back strongly after losing the first set to beat the 80th-ranked Agut 3-6, 6-1, 6-3 in an hour and 49 minutes at the Nungambakkam tennis stadium.

Tipsarevic conceded just four games in the last two sets to end the giant-killing run by the 24-year-old Spaniard, who defeated top-seed Tomas Berdych in the quarter-finals.