Roger Federer of Switzerland holds his trophy after winning the final match at the Dubai Duty Free Tennis Championship against Stefanos Tsitsipas of Greece, in Dubai, United Arab Emirates, March 2, 2019. Roger Federer claimed the 100th ATP title of his career by beating 20-year-old Greek Stefanos Tsitsipas 6-4 6-4. The 20-times Grand Slam champion became the second man in the Open Era to win 100 titles, after American Jimmy Connors who won 109. (Photo/Agencies)
Roger Federer of Switzerland holds his trophy after winning the final match at the Dubai Duty Free Tennis Championship against Stefanos Tsitsipas of Greece, in Dubai, United Arab Emirates, March 2, 2019. Roger Federer claimed the 100th ATP title of his career by beating 20-year-old Greek Stefanos Tsitsipas 6-4 6-4. The 20-times Grand Slam champion became the second man in the Open Era to win 100 titles, after American Jimmy Connors who won 109. (Photo/Agencies)
Roger Federer of Switzerland holds his trophy after winning the final match at the Dubai Duty Free Tennis Championship against Stefanos Tsitsipas of Greece, in Dubai, United Arab Emirates, March 2, 2019. Roger Federer claimed the 100th ATP title of his career by beating 20-year-old Greek Stefanos Tsitsipas 6-4 6-4. The 20-times Grand Slam champion became the second man in the Open Era to win 100 titles, after American Jimmy Connors who won 109. (Photo/Agencies)
Roger Federer of Switzerland serves during their final match at the Dubai Duty Free Tennis Championship, in Dubai, United Arab Emirates, March 2, 2019. Roger Federer claimed the 100th ATP title of his career by beating 20-year-old Greek Stefanos Tsitsipas 6-4 6-4. The 20-times Grand Slam champion became the second man in the Open Era to win 100 titles, after American Jimmy Connors who won 109. (Photo/Agencies)
Stefanos Tsitsipas of Greece serves during their final match at the Dubai Duty Free Tennis Championship, in Dubai, United Arab Emirates, March 2, 2019. Roger Federer claimed the 100th ATP title of his career by beating 20-year-old Greek Stefanos Tsitsipas 6-4 6-4. The 20-times Grand Slam champion became the second man in the Open Era to win 100 titles, after American Jimmy Connors who won 109. (Photo/Agencies)
Roger Federer of Switzerland reacts during their final match at the Dubai Duty Free Tennis Championship, in Dubai, United Arab Emirates, March 2, 2019. Roger Federer claimed the 100th ATP title of his career by beating 20-year-old Greek Stefanos Tsitsipas 6-4 6-4. The 20-times Grand Slam champion became the second man in the Open Era to win 100 titles, after American Jimmy Connors who won 109. (Photo/Agencies)
Stefanos Tsitsipas of Greece reacts during their final match at the Dubai Duty Free Tennis Championship, in Dubai, United Arab Emirates, March 2, 2019. Roger Federer claimed the 100th ATP title of his career by beating 20-year-old Greek Stefanos Tsitsipas 6-4 6-4. The 20-times Grand Slam champion became the second man in the Open Era to win 100 titles, after American Jimmy Connors who won 109. (Photo/Agencies)
Roger Federer of Switzerland holds his trophy after winning the final match at the Dubai Duty Free Tennis Championship against Stefanos Tsitsipas of Greece, in Dubai, United Arab Emirates, March 2, 2019. Roger Federer claimed the 100th ATP title of his career by beating 20-year-old Greek Stefanos Tsitsipas 6-4 6-4. The 20-times Grand Slam champion became the second man in the Open Era to win 100 titles, after American Jimmy Connors who won 109. (Photo/Agencies)