The defenseman was injured late in a 3-2 shootout loss to the Philadelphia Flyers on Sunday and did not play in overtime. The Bruins next play on Friday at the Toronto Maple Leafs and host the Washington Capitals on Saturday.
"We will re-evaluate as the week goes on, so we're not taking him out of the equation this weekend," Bruins coach Bruce Cassidy said. "He was here, but again until I get more, I've got nothing for you."
Krug has 13 points (two goals, 11 assists) and 11 power-play points in 17 games after scoring 53 points (six goals, 47 assists) last season. He has topped 50 points in each of the past three seasons.
Boston recalled
Urho Vaakanainen
from Providence of the American Hockey League on Monday. He skated on the third defense pair with Connor Clifton. Either Vaakanainen or Steven Kampfer will replace Krug in the lineup Tuesday.
"Defending better. I think early on he was getting stuck wide," Cassidy said of Vaakanainen. "I don't know if that's a European-sized-rink issue, or the way they played over there. But that was an issue early on. It showed on some goals against, he was getting beat to the middle. We've seen teams more and more flying a guy through there, so we've got to make sure that's buttoned up, if he does end up in the lineup."
Defenseman Kevan Miller practiced in a regular jersey and is making progress after he fractured his right kneecap twice last season, the second time when he was about to return for the Stanley Cup Final. He first injured it April 4 and missed the entirety of the Stanley Cup Playoffs.
"We're not quite sure yet," said Miller, who began skating a month ago. "It's just nice to be back with the guys. … I feel pretty good, though."
Forwards Jake DeBrusk, Brett Ritchie and David Backes each did not practice and will not play Tuesday.
The Bruins, who are in first place in the Atlantic Division (11-3-3), are winless in their past three games (0-2-1).
