Messi has not scored in his last four league matches, with suggestions that a thigh problem, which he picked up at the beginning of the season, is still troubling him.
"Leo will get back to scoring again soon," Pedro told reporters at a press conference.
"He's giving assists as usual and working very hard for the team. He's great as always, if you ask me."
Despite his recent troubles, Messi has scored 12 goals in 14 matches this season.