Arsene Wenger this week publicly admitted that he is looking at the possibility of bringing Zaha to the Emirates before February along with Edinson Cavani.
However, United believe they are still in the driving seat for the pacey wingers signature after reopening talks with the South London club this week.
Palace initially rejected an opening bid of £6million from Sir Alex Ferguson but the Red Devils are planning to go back with a tempting £10million offer than would include Zaha remaining at the Championship club this season to help them towards promotion.
Zaha tweeted last week that he was on his way to the top of the Premier League before quickly deleting it, hinting that United’s talks have gone well.
Arsenal will need to outbid United in order to keep Zaha in the capital.