Manchester United and Manchester City have joined the battle for Crystal Palace winger Wilfried Zaha. The Manchester Evening News says Zaha has been on Sir Alex Ferguson's radar ever since his sensational performance inspired Palace to a shock Carling Cup victory over United last November.

As a two-footed winger he is seen as a potential replacement for Nani if the Portuguese international is allowed to leave Old Trafford.

Ferguson is also considering Porto's £40m-rated James Rodriguez, but Zaha would represent a much cheaper alternative.

The England under-21 star could be available for around £15m.

That would also interest Roberto Mancini, with City already signing rising English talents Jack Rodwell and Scott Sinclair in the summer.