Buffalo Sabres goaltender Linus Ullmark will miss at least one month with an undisclosed injury, head coach Ralph Krueger confirmed on Saturday, according to the Times Herald's Bill Hoppe.

Ullmark exited in the first period of Thursday's 4-3 overtime loss to the New Jersey Devils and didn't come back. The 27-year-old owns a 2.44 goals-against average and a .919 save percentage over 12 games this season.

Meanwhile, defenseman Rasmus Ristolainen will return against the Philadelphia Flyers on Saturday after his grueling bout with COVID-19 earlier this month.

The Finnish blue-liner recently opened up about his struggles with significant drops in oxygen levels, intense chest pain, and fatigue. The 26-year-old hasn't played since Jan. 31.

Sabres captain Jack Eichel remains day-to-day and will miss his second straight game, but he could return Sunday. Winger Jeff Skinner, who's been a healthy scratch during the team's previous three contests, will also return to the lineup Saturday.

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