The former US Open champion has a big heart and a bigger forehand, and is a popular figure on the tennis circuit among fans and players alike.
Del Potro, ranked 32 in the world, exited Wimbledon in the third round last year, in what was his first appearance at the All England Club in three years.
The 28-year-old reached the semis back in 2013, where he lost a five-set epic to Novak Djokovic, who went on to lose the final to Andy Murray.
Del Potro has enjoyed a friendly rivalry with Murray of late - losing out on gold to the Brit at Rio 2016, before getting revenge in the Davis Cup semi-final in September. The five-set thriller in the latter exchange was the longest match of either of their careers.