Tavares was hurt late in the contest, and medical staff will reassess him after the initial set time frame. The Leafs play six games - including back-to-back games twice - over the next two weeks.
The 29-year-old pivot has been incredibly durable throughout his career, suiting up in at least 77 games in each of the past five seasons. However, he was ruled out of the World Championship in May due to an oblique injury that sidelined him for a month.
Tavares had registered three goals and four assists before suffering the injury. He's in his second season with the Maple Leafs and was named team captain earlier this month.