|26/02/18||R Bautista-Agut||ATP Dubai Duty Free Tennis Championships||R1||Lost|
|12/02/18||F Del Bonis||ATP Argentina Open||R1||Lost|
|06/02/18||M Basic||ATP Diema Xtra Sofia Open||R1||Lost|
|17/01/18||W Koolhof & A Sitak||Australian Open||R1||Lost|
|16/01/18||E Donskoy||Australian Open||R1||Lost|
|01/01/18||S Tsitsipas||ATP Qatar ExxonMobil Open||R1||Lost|
Del Potro back in the big time
Nine years after winning his first major at the US Open, Juan Martin del Potro is now a master after his success in the desert at Indian Wells.
WATCH: Federer's 14 years at No 1
From fashion to technology and everything in between, a lot has changed since the first time Roger Federer claimed the No 1 ATP Ranking in 2004.
VOTE: Who is the G.O.A.T?
Roger Federer claimed a 20th Grand Slam title at the Australian Open and then became the oldest-ever world No 1 - but is he the greatest sportsperson of all time?