"He's one of three or four players we are chasing," Pardew told Saints' official website.
"He's a player we admire but whether we can secure him I don't know. If we don't we'll move on to somebody else."
Chelsea were drawn against Barcelona in one of the standout ties of the Champions League last 16.
Premier League champions Chelsea have been drawn to face Barcelona in the Champions League last-16.
Jose Mourinho is not the first Manchester United manager to be involved in a tunnel incident – in fact he
Jurgen Klopp became the latest manager to give an awkward post-match interview after Liverpool's 1-1 Merseyside derby draw with Everton.
Manchester City equalled the Premier League's record winning run of 14 games by beating Manchester United 2-1 on Sunday.
The 2018 World Cup finals draw takes place in Moscow on Friday, with England hoping to avoid a so-called ‘group