Sevilla trained in Spain as Nemanja Matic warned his Manchester United team-mates to be wary of their Champions League opponents.
Matic believes Vincenzo Montella's side will prove to be a difficult test despite his team going into the last 16 tie as favourites.
The Serbia international has highlighted Sevilla's former Premier League stars such as Jesus Navas, Steven N'Zonzi and Roque Mesa as players to keep a watchful eye on.
Matic, speaking to Manchester United's official website ahead of the first competitive meeting between the two clubs, said: 'They have a couple of players who have already played in the Premier League and for sure that is going to be better for them.