Just to show how long he's been around, here some of the former players he played against:
Mark Woodforde, now aged 51, in 1996 (Indianapolis).
Michael Stich (US Open 1996)
Thomas Muster (Miami 1997)
Guy Forget (can't remember)
Alberto Berasategui (Hamburg 1997)
Magnus Gustafsson (Rome 1997)
Jeff Tarango (Halle 1997)
Christian Ruud (Casper Ruud's father)
Petr Korda (Washington 1997)
Marcelo Rios (US Open 1997)
And less remembered players like Kuerten, Pioline, Rafter, Todd Martin, Hicham Arazi, Magnus Norman, Bruguera, Krajicek, Santoro, Kafelnikov, Boetsch, Chang, Sampras, Agassi, Stoltenberg, Philippoussis, Ferreira, Rosset, Magnus Larsson, Marc-Kevin Goellner, Courier, Carlos Costa, Raoux, Simmerink...i better put an "etc." here now.
At the same time, it's possible that he competes against teens like Alex de Minaur this year.
He's basically the bridge to a long extinct era...