(180214) -- DOHA, Feb. 14, 2018 (Xinhua) -- Simona Halep of Romania serves during the single's second round match against Ekaterina Makarova of Russia at the 2018 WTA Qatar Open in Doha, Qatar, on Feb. 14, 2018. Simona Halep won 2-0. (Xinhua/Nikku) (wll)more(180214) -- DOHA, Feb. 14, 2018 (Xinhua) -- Ekaterina Makarova of Russia returns the ball during the single's second round match against Simona Halep of Romania at the 2018 WTA Qatar Open in Doha, Qatar, on Feb. 14, 2018. Ekaterina Makarova lost 0-2. (Xinhua/Nikku) (wll)more(180214) -- DOHA, Feb. 14, 2018 (Xinhua) -- Simona Halep of Romania returns the ball during the single's second round match against Ekaterina Makarova of Russia at the 2018 WTA Qatar Open in Doha, Qatar, on Feb. 14, 2018. Simona Halep won 2-0. (Xinhua/Nikku) (wll)more(180214) -- DOHA, Feb. 14, 2018 (Xinhua) -- Ekaterina Makarova of Russia serves during the single's second round match against Simona Halep of Romania at the 2018 WTA Qatar Open in Doha, Qatar, on Feb. 14, 2018. Ekaterina Makarova lost 0-2. (Xinhua/Nikku) (wll)more(180214) -- DOHA, Feb. 14, 2018 (Xinhua) -- Agnieszka Radwanska of Poland serves the ball during the single's second round match against Petra Kvitova of Czech Republic at the 2018 WTA Qatar Open in Doha, Qatar, on Feb. 14, 2018. Petra Kvitova won 2-1. (Xinhua/Nikku) (wll)more(180214) -- DOHA, Feb. 14, 2018 (Xinhua) -- Agnieszka Radwanska of Poland returns the ball during the single's second round match against Petra Kvitova of Czech Republic at the 2018 WTA Qatar Open in Doha, Qatar, on Feb. 14, 2018. Petra Kvitova won 2-1. (Xinhua/Nikku) (wll)more(180214) -- DOHA, Feb. 14, 2018 (Xinhua) -- Petra Kvitova of Czech Republic returns the ball during the single's second round match against Agnieszka Radwanska of Poland at the 2018 WTA Qatar Open in Doha, Qatar, on Feb. 14, 2018. Petra Kvitova won 2-1. (Xinhua/Nikku) (wll)more(180214) -- DOHA, Feb. 14, 2018 (Xinhua) -- Petra Kvitova of Czech Republic returns the ball during the single's second round match against Agnieszka Radwanska of Poland at the 2018 WTA Qatar Open in Doha, Qatar, on Feb. 14, 2018. Petra Kvitova won 2-1. (Xinhua/Nikku) (wll)more