Premier League giants Manchester United take on Spanish side Villarreal in a pulsating final on Wednesday.
Anthony Martial and Phil Jones are not part of the travelling 26-man team to Gdansk, while there's no clarity on Harry Maguire's availability.
Emery, who will be leading Villarreal against Manchester United in the Europa League final, had coached Mata during his time at Valencia.
Wednesday will see Manchester United in their very first cup final in the Solskjaer era and the Norwegian will need all the help he can get.
Emery, who will be leading Villarreal in the Europa League final against Manchester United, had coached Cavani during his stint at PSG.
Los Blancos produced a late fightback to beat Villarreal, but it was not enough as Atletico Madrid won their match to win the La Liga title.
A late comeback victory against Villarreal meant little to Real Madrid as Atletico Madrid completed their job in the other match to win the La Liga title.
Atletico overcome a goal deficit to beat Real Valladolid 2-1 in the final league game as Real Madrid's come-from-behind victory against Villarreal goes in vain.
Manchester United have lost their last two matches in the Premier League against Liverpool and Leicester City.
The originally scheduled match against Liverpool had to be postponed over massive protests outside Old Trafford.