Barcelona host Juventus in the Gamper Trophy on August 8, which could see the two global superstars up against each other for the 37th time.Of course, there is no guarantee that either player will line up at the Camp Nou next month, as their respective managers look to manage their players' workloads following their international commitments this summer.With both Ronaldo and Messi now in their mid-30s, it could prove to be their final meeting if they do play.However, with no sign of either player slowing down there could yet be many more showdowns between them to come, amid the possibility of their sides clashing in the Champions League again next term.Ronaldo is expected to return to training with his team-mates on Monday after helping.
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