Chelsea legend Pat Nevin believes there has never been greater competition for places within the squad in the past few years.
Manager Frank Lampard has undertaken a massive spending spree in the summer, especially in the attacking positions.
It means England hopefuls Tammy Abraham and Callum Hudson-Odoi are left worried about their club places. And Nevin thinks they will have to up their games.
He told the club's official website regarding the duo: "You have to enjoy these moments because it can all change very quickly, no matter how high you are flying at any time.
"Callum Hudson-Odoi looked like a stick-on for a place in that team, as did Ruben Loftus-Cheek, but if things do not go your way there are plenty of players ready, willing and very able to show they are hungry enough to grab it themselves.
"What about Tammy Abraham as well, he looked like he was nudging Harry Kane out of the way for that No.9 shirt with the three lions on the front, but suddenly Dominic Calvert-Lewin hits an incredible run of form and the pecking order moves again."
