Wawrinka - Wimbledon
Mere Mortals-
Djokovic - RG, become first man to win the double career slam. He certainly has the second best chance after Nadal winning the AO.
Federer - Wimbledon, #20 at the All England Club would be incredible. And the tournament he retires in? Yea, that'd be incredible.
Murray - AO, He deserves one, he's too good to not win one. The only reason why he didn't win one is because he was born the same time as Djokovic.
Nadal - AO, Same reason as Djokovic, except he has a better chance to get the AO than Djoker to get RG.
Delpo - USO, because one isn't enough. His heartbreak in 2017 has to be avenged.
Cilic - Wimbledon, He deserves one, such a good grass court player when he's on his day. Had he not been injured could've possibly done something against Federer.
Tsonga - AO, Losing the 2008 Final to Djoker sucked, bad. Fairy tale runs without happy ending are always bad. Hopefully he can get just one GS down under.