Dominic Calvert-Lewin in action against Southampton. Peter Byrne/PA Images via Getty Images

Everton striker Dominic Calvert-Lewin will be out for up to two months after suffering an ankle injury on his first Premier League start.

Calvert-Lewin, 19, was named in the team for the victory over Southampton on Monday but had to come off after 12 minutes.

And speaking at a news conference ahead of his side's FA Cup tie against Leicester City at the weekend, Koeman said: "Calvert-Lewin is out for up to seven to eight weeks."

The manager also confirmed that James McCarthy had not yet resumed training following a hamstring injury, while goalkeeper Martin Stekelenburg also misses out.