straight to your inboxDimitar Berbatov does not think Manchester United need to sign another striker in the current transfer window.United are still working on what would be a club record deal for Borussia Dortmund winger Jadon Sancho and the MEN reported this week they are also on the lookout for a back-up striker.Having extended Odion Ighalo's loan from Shanghai Shenhua until late January, United have four number nines to choose from with Anthony Martial established as the frontman and Marcus