Watford boss Walter Mazzarri says he's prepared to break up strike-pairing Troy Deeney and Odion Ighalo.
With £22m duo Stefano Okaka and Isaac Success having arrived at the club this summer, Mazzarri says nobody can take their place for granted.
The Italian said: “It's very important there is more competition. It will be the pitch that will decide on who is ready to start in my line-up.
“Lately Success has been injured so he has been delayed a little bit more than the other players but I also take into considering Okaka and Success but also Jerome Sinclair.
“The type of football I like, my mentality of total football means that everyone runs everyone wants to be part of the game.
“The players that come in as a substitute have to show that they can play better than the players that came out."