(Reuters) - Argentina captain Lionel Messi is ready to return to their line-up when they play Venezuela in the CONMEBOL World Cup qualifiers, but midfielder Alexis Mac Allister's availability is in doubt, manager Lionel Scaloni said.

Argentina were boosted by the return of Messi for their World Cup qualifiers against Venezuela and Bolivia after the 37-year-old recovered from a right ankle injury, which he picked up during the Copa America final against Colombia in July.