Toronto Maple Leafs captain John Tavares has been discharged from hospital following a head injury suffered on Thursday that will see him out indefinitely.

Off balance following a collision, a prone Tavares was caught by the knee of passing Montreal Canadiens winger Corey Perry during the opening game of the playoff series.

Tavares initially rose to his knees before then slipping back down to the ice. He was taken from the rink on a stretcher, though did offer a thumbs-up upon his departure midway through the first period.

The Leafs announced on Friday that, following thorough checks, the 30-year-old was cleared to return home and rest. There is no timetable for his return to action, though.

"Toronto Maple Leafs captain John Tavares has been discharged from hospital this morning," read a statement released by the team via social media.

"He was thoroughly examined and assessed by the neurosurgical team at St Michael’s Hospital and the club's medical director.

"He was kept overnight for observation and is now resting at home under the care and supervision of team physicians.

"Tavares will be out indefinitely."

The Maple Leafs lost 2-1 at the start of the best-of-seven series in the first round of the Stanley Cup playoffs. Game two takes place in Toronto on Saturday.

Tavares had 19 goals and 31 assists in the regular season, helping his team finish top of the North Division. He has 819 points in his NHL career, having previously played for the New York Islanders.