Bulgarian tennis star Grigor Dimitrov will begin working with Chris Groh. The former World No. 3 had been without a coach for the past few months since splitting up with Czech Radek Stepanek. The German-born Groh has worked with Tommy Haas, Michael Berrer, Taylor Fritz and Bradley Klahn amongst others in the past and had been working with the United States Tennis Association for the past four years.
Groh has been involved in coaching since 2010 and during his collaboration with Haas, the German climbed from outside the Top 200 to No. 11 in the world rankings in less than 24 months - winning titles in Halle, Munich and Vienna during that period and was also named ATP Comeback Player of the Year in 2012.
During his time with Fritz, the American won the US Open Juniors, reached the French Open final and became #1 in the world in the Junior ITF Rankings in 2015. In the same year, he also won back-to-back Challenger titles in Sacramento and Fairfield at the age of 17.
38-year-old Groh holds an MBA degree from the University of San Diego. 28-year-old Dimitrov, who has been as high as No. 3 in the rankings, has had a good end to the 2019 season - climbing from outside the Top 50 to No. 20 in the rankings after he reached the semi-finals of the US Open, where beat Roger Federer for the first time in his career, and the semi-finals of the Paris Masters.
The previous coaches of Dimitrov included Daniel Vallverdu, Franco David, Johan Jortegen, Roger Rashid, Mikael Tilstrom, Patrick Mouratoglou, Peter McNamara and Peter Lundgren.