Philipp Kohlschreiber of Germany hits a return during the singles first round match between Roger Federer of Switzerland and Philipp Kohlschreiber of Germany at the ATP Dubai Duty Free Tennis Championships 2019 in Dubai, the United Arab Emirates, Feb. 25, 2019. Roger Federer won 2-1. (Xinhua/Mahmoud Khaled)
Roger Federer of Switzerland celebrates after winning the singles first round match between Roger Federer of Switzerland and Philipp Kohlschreiber of Germany at the ATP Dubai Duty Free Tennis Championships 2019 in Dubai, the United Arab Emirates, Feb. 25, 2019. Roger Federer won 2-1. (Xinhua/Mahmoud Khaled)
Roger Federer of Switzerland celebrates after winning the singles first round match between Roger Federer of Switzerland and Philipp Kohlschreiber of Germany at the ATP Dubai Duty Free Tennis Championships 2019 in Dubai, the United Arab Emirates, Feb. 25, 2019. Roger Federer won 2-1. (Xinhua/Mahmoud Khaled)
Roger Federer of Switzerland serves during the singles first round match between Roger Federer of Switzerland and Philipp Kohlschreiber of Germany at the ATP Dubai Duty Free Tennis Championships 2019 in Dubai, the United Arab Emirates, Feb. 25, 2019. Roger Federer won 2-1. (Xinhua/Mahmoud Khaled)
Roger Federer of Switzerland celebrates after winning the singles first round match between Roger Federer of Switzerland and Philipp Kohlschreiber of Germany at the ATP Dubai Duty Free Tennis Championships 2019 in Dubai, the United Arab Emirates, Feb. 25, 2019. Roger Federer won 2-1. (Xinhua/Mahmoud Khaled)
Roger Federer of Switzerland serves during the singles first round match between Roger Federer of Switzerland and Philipp Kohlschreiber of Germany at the ATP Dubai Duty Free Tennis Championships 2019 in Dubai, the United Arab Emirates, Feb. 25, 2019. Roger Federer won 2-1. (Xinhua/Mahmoud Khaled)
Roger Federer of Switzerland serves during the singles first round match between Roger Federer of Switzerland and Philipp Kohlschreiber of Germany at the ATP Dubai Duty Free Tennis Championships 2019 in Dubai, the United Arab Emirates, Feb. 25, 2019. Roger Federer won 2-1. (Xinhua/Mahmoud Khaled)
Roger Federer of Switzerland serves during the singles first round match between Roger Federer of Switzerland and Philipp Kohlschreiber of Germany at the ATP Dubai Duty Free Tennis Championships 2019 in Dubai, the United Arab Emirates, Feb. 25, 2019. Roger Federer won 2-1. (Xinhua/Mahmoud Khaled)
Roger Federer of Switzerland hits a return during the singles first round match between Roger Federer of Switzerland and Philipp Kohlschreiber of Germany at the ATP Dubai Duty Free Tennis Championships 2019 in Dubai, the United Arab Emirates, Feb. 25, 2019. Roger Federer won 2-1. (Xinhua/Mahmoud Khaled)
Roger Federer of Switzerland hits a return during the singles first round match between Roger Federer of Switzerland and Philipp Kohlschreiber of Germany at the ATP Dubai Duty Free Tennis Championships 2019 in Dubai, the United Arab Emirates, Feb. 25, 2019. Roger Federer won 2-1. (Xinhua/Mahmoud Khaled)
