Lionel Messi in Barcelona's starting lineup for Bayern

Barcelona says Lionel Messi has been declared medically fit and is available to play in Tuesday's Champions League semifinal against Bayern Munich, although the team had yet to release its starting lineup.

Superstar player dealing with hamstring issue

Lionel Messi, shown practising Monday, came off the bench in the last Champions League match for Barcelona. (Alex Grimm/Getty Images)

Lionel Messi will start Barcelona's Champions League semifinal against Bayern Munich after being declared medically fit following a leg injury.

In a brief statement, the club said Tuesday that "the player has been given the medical all-clear," and he was later named up front in the starting lineup.

Messi injured a hamstring on April 2 and has since been sidelined for three Spanish league games.

However, he went on as a substitute in the second half in the return leg against Paris Saint-Germain to help Barcelona come from behind and advance from the quarterfinals two weeks ago.

The four-time FIFA player of the year changed the momentum of that game, demonstrating once again what a crucial asset the Argentina forward is for Barcelona.