What happened: Nick Paul's availability for the Toronto Maple Leafs' regular-season opener is in doubt. Bo Groulx skated in his place on the third line during the team's latest practice.

Why it matters: Paul was acquired during the offseason to strengthen Toronto's forward depth. An absence on opening night would create an immediate opportunity for Groulx to secure a regular role in the lineup.

What to watch: Monitor Paul's practice participation as the preseason concludes.