Curtis Lazar wasn't at Ottawa Senators camp as it opened Friday, and there's no word on when he'll return:

#Sens HC Guy Boucher has disclosed that @CurtisLazar95 missed practice today on account of mono. His progress will be evaluated daily. — Sens communications (@Media_Sens) September 23, 2016

"We're going to be really cautious," head coach Guy Boucher said of the forward, according to the Ottawa Sun's Bruce Garrioch.

A Senators first-round pick, 17th overall, in 2013, Lazar had six goals and 14 assists in 76 games last season while averaging 13:52 in ice time. His 14 helpers and 20 points were career highs.