West Ham United boss Sam Allardyce has challenged Ricardo Vaz Te to prove himself after having a deadline day transfer request rejected. 

In his column in the London Evening Standardthe Hammers chief has expressed his desire to see an improvement from the Portuguese striker, who tried to force a late move on deadline day. 

"Ricardo Vaz Te submitted a transfer request before deadline day but now the window is shut, he has to get on with it", Allardyce wrote. 

'Big Sam' admitted that there was an opportunity to get Demba Ba or Romelu Lukaku on loan but a deal wasn't reached. 

'We had an opportunity to loan a player — either Demba Ba or Romelu Lukaku — just before the day but unfortunately it didn’t happen', he added. 

With the recent injury blow to striker Andy Carroll, Allardyce is left with Vaz Te and new signing Mledan Petric, who came on a free. 

But the Irons manager is hoping to see Vaz Te improve his performances and earn the striker spot through hard work. 

"It’s down to him and he has to convince me he’s the best man for the job. He thinks it’s my fault because he hasn’t played as much as he wanted to but I don’t think his performances have been as good as they should have been. It’s his responsibility to prove me wrong. There is a right and a wrong way to ask for a transfer — he chose the wrong way", he said.

West Ham travel to Southampton at the weekend to face Mauricio Pochettino's side. 

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