Tevez flew into Manchester on Tuesday after finishing on the losing side in Sunday's Copa America final with Argentina, while Manchester United are on a pre-season tour in Japan.
The 22-year-old Messi helped the Catalan giants to the Spanish La Liga and European Champions League titles as well as the Copa Del Rey, while his Argentina side scraped into the World Cup finals after finishing fourth in their South American qualifying campaign.
Tevez flew into Manchester on Tuesday after finishing on the losing side with Argentina in Sunday's Copa America final against Brazil, while Manchester United are on a pre-season tour in Japan.