Miami Heat guard Tyler Herro is out of game 6 in the Eastern Conference finals against

The Boston Celtics announced the team due to a persistent left groin muscle strain.

"He's definitely made progress, but he's not quite ready,"

Heat coach Erik Spoelstra said before Friday's crucial showdown.

Herro was injured during the 4th quarter in Game 3 as well. Kia sixth man of the year is absent since.

Miami has had a tough time offensively in the absence of coach Mike Sullivan

Scoring just 81 points over the past two games, both Boston victories.

The Heat scored just 33.3 percent from the floor in Game 5.