Kucherov and Sergachev each did not finish Game 4 on Saturday because of an undisclosed injury sustained in the third period. The Lightning won 6-2 to extend their lead in the best-of-7 series.
"I don't have a status report yet," Lightning coach Jon Cooper said Sunday, an off day for Tampa Bay.
Kucherov, a forward, was injured when he was slashed on the left leg by Panthers forward Anthony Duclair at 10:57 of the third period. Duclair received a minor penalty.
Sergachev, a defenseman, was injured when he was hit into the boards by Panthers forward Patric Hornqvist at 16:24. He appeared to be favoring his left arm or shoulder as he left the ice.
Kucherov scored four points (one goal, three assists) in Game 4 and leads the NHL with nine points (three goals, six assists) in the Stanley Cup Playoffs. He didn't play in the regular season while recovering from hip surgery he had Dec. 29.
Sergachev has one assist in the series. He scored 30 points (four goals, 26 assists) in 56 regular-season games.
Cooper didn't have an update on the status for forward Barclay Goodrow, who has missed the first four games of the series with an upper-body injury.
