Results from the third day of the Monte-Carlo Masters on Tuesday (x denotes seeding): 1st rd Albert Ramos (ESP) bt Radek Stepanek (CZE) 6-3, 6-3 Stanislas Wawrinka (SUI x13) bt Denis Istomin (UZB) 6-3, 7-5 Marinko Matosevic (AUS) bt Fernando Verdasco (ESP) 7-5, 6-3 2nd rd Grigor Dimitrov (BUL) bt Janko Tipsarevic (CRO x8) 7-6 (7/3), 6-1 afp

(Reuters) - Germany's Tommy Haas recorded the upset of the tournament when he stunned two-time defending champion Novak Djokovic 6-2 6-4 in the fourth round of the Sony Open at Miami on Tuesday. Haas, who turns 35 next week, needed just 80 minutes to end Djokovic's 14-match winning streak at the tournament and consign the world number one Serb to just his second loss of the season. "Playing against someone like Novak and coming out on top at this time of my career, it's unbelievable," Haas told reporters.

Results from the second day of the Dubai Open on Tuesday (x denotes seeding): 1st rd Juan Martin Del Potro (ARG x4) bt Marcos Baghdatis (CYP) 4-6, 6-4, 7-6 (7/4) Tobias Kamke (GER) bt Mikhail Kukushkin (KAZ) 4-6, 6-4, 6-4 Nikolay Davydenko (RUS) bt Janko Tipsarevic (SRB x6) 6-0, 7-5 Victor Hanescu (ROM) bt Bernard Tomic (AUS) 3-2 - rtd Marcel Granollers (ESP) bt Albert Montanes (ESP) 6-3, 6-1 Dmitry Tursunov (RUS) bt Jan Hajek (CZE) 4-6, 6-1, 6-2 Tomas Berdych (CZE x3) bt Rajeev Ram (USA) 6-1, 6-3

Results from the second day of the Dubai Open on Tuesday (x denotes seeding): 1st rd Juan Martin Del Potro (ARG x4) bt Marcos Baghdatis (CYP) 4-6, 6-4, 7-6 (7/4) Tobias Kamke (GER) bt Mikhail Kukushkin (KAZ) 4-6, 6-4, 6-4 Nikolay Davydenko (RUS) bt Janko Tipsarevic (SRB x6) 6-0, 7-5 Victor Hanescu (ROM) bt Bernard Tomic (AUS) 3-2 - rtd Marcel Granollers (ESP) bt Albert Montanes (ESP) 6-3, 6-1 Dmitry Tursunov (RUS) bt Jan Hajek (CZE) 4-6, 6-1, 6-2 Tomas Berdych (CZE x3) bt Rajeev Ram (USA) 6-1, 6-3 afp13