LOS ANGELES, CA. JULY 29: Benjamin Becker of Germany and James Blake of USA (pictured) play a match at the 2010 Farmers Classic on July 29 2010 in Los Angeles
LOS ANGELES, CA. JULY 29: Benjamin Becker of Germany and James Blake of USA (pictured) play a match at the 2010 Farmers Classic on July 29 2010 in Los Angeles
MONTREAL - AUGUST 7: Novak Djokovic on court of Montreal Rogers Cup on August 7, 2011 in Montreal, Canada.Novak Djokovic is a Serbian professional tennis player who is ranked the World No. 1
MONTREAL - AUGUST 7: Novak Djokovic on court of Montreal Rogers Cup on August 7, 2011 in Montreal, Canada.Novak Djokovic is a Serbian professional tennis player who is ranked the World No. 1
MONTREAL - AUGUST 5: Roger Federer on court of Montreal Rogers Cup on August 5, 2011 in Montreal, Canada. Roger Federer is a Swiss professional tennis player who held 1 position for a record 237 weeks
LOS ANGELES, CA. JULY 29: Benjamin Becker of Germany and James Blake of USA (pictured) play a match at the 2010 Farmers Classic on July 29 2010 in Los Angeles
MONTREAL - AUGUST 7: Novak Djokovic on court of Montreal Rogers Cup on August 7, 2011 in Montreal, Canada.Novak Djokovic is a Serbian professional tennis player who is ranked the World No. 1
LOS ANGELES, CA. - JULY 31: Somdev Kishore Devvarman (IND) in action during the 2011 Farmers Classic doubles final on July 31 2011 in Los Angeles.
LOS ANGELES, CA - July 25: Igor Sijsling reaches for the ball during Day 3 of the Farmers Classic presented by Mercedes-Benz at the LA Tennis Center on July 25, 2012 in Los Angeles, California.
LOS ANGELES, CA. JULY 29: Benjamin Becker of Germany and James Blake of USA (pictured) play a match at the 2010 Farmers Classic on July 29 2010 in Los Angeles
LOS ANGELES, CA - JULY 26: Matthew Ebden in action during Day 4 of the Farmers Classic presented by Mercedes-Benz at the LA Tennis Center on July 26, 2012 in Los Angeles, California.
Lukasz Kubot with Marcelo Melo (not pictured) ose the men's doubles championship to Henri Kontinen and John Peers (not pictured) at the Citi Open tennis tournament on August 6, 2017 in Washington DC
LOS ANGELES, CA. - JULY 29: Alejandro Falla of Columibia (pictured) and Erenests Gulbis of Latvia play a match at the 2010 Farmers Classic on July 29 2010 in Los Angeles.
LOS ANGELES, CA - JULY 26: Matthew Ebden in action during Day 4 of the Farmers Classic presented by Mercedes-Benz at the LA Tennis Center on July 26, 2012 in Los Angeles, California.
LOS ANGELES, CA - JULY 28: Marinko Matosevic in action during Day 5 of the Farmers Classic presented by Mercedes-Benz at the LA Tennis Center on July 28, 2012 in Los Angeles, California.
LOS ANGELES, CA. - AUGUST 1: Bob Bryan of USA (pictured) & Mike Bryan of USA play the doubles final against Eric Butorac of USA & Jean-Julien Rojer of Holland at the 2010 Farmers Classic on August 1 2010 in Los Angeles.
LOS ANGELES, CA. - JULY 31: No. 1 seed Mardy Fish (USA) in action during the 2011 Farmers Classic singles final on July 31 2011 in Los Angeles.
MONTREAL - AUGUST 5: Stanislas Wawrinka on training court of Montreal Rogers Cup on August 5, 2011 in Montreal, Canada.Stanislas Wawrinka is a Swiss professional tennis player.
MONTREAL - AUGUST 5: Roger Federer on court of Montreal Rogers Cup on August 5, 2011 in Montreal, Canada. Roger Federer is a Swiss professional tennis player who held 1 position for a record 237 weeks
LOS ANGELES, CA. JULY 27: Leonardo Mayer of Argentina vs James Blake of USA (pictured) play a match at the 2010 Farmers Classic on July 27 2010 in Los Angeles
LOS ANGELES, CA. - JULY 29: Alejandro Falla of Columibia (pictured) and Erenests Gulbis of Latvia play a match at the 2010 Farmers Classic on July 29 2010 in Los Angeles.
Sam Querrey of the United States serves against Guido Pella of Argentina in their first round match of the men's singles during the 2018 ATP Chengdu Open tennis tournament in Chengdu city, southwest China's Sichuan province, 25 September 2018
MONTREAL - AUGUST 5: Novack Djokovic on training court of Montreal Rogers Cup on August 5, 2011 in Montreal, Canada.