Celtic's assistant manager Johan Mjallby has said that the club needs James Forrest to stay fit as he is a "special player".

The Scotland winger scored in the 2-0 win against Hearts, a result that extended Celtic's unbeaten league run to 16 matches.

"When James Forrest came on for the second half, he gave us the spark and I think we controlled the game," Mjallby told Sky Sports News.

"He was always a threat for us. A fit James Forrest will always start every game but it is hard keeping him fit this season.

"We need to try to keep him fit and have him more involved in the team because he is a special player for us."

Celtic are 10 points clear at the top of the Scottish Premiership.