Both players suffered injuries during the Blues' 2-1 win at Aston Villa on Saturday with growing fears they would miss out on facing Benfica at the Amsterdam ArenA.
|80/1||Chelsea are 80/1 with Paddy Power to beat Benfica 3-1 & Mata to open the scoring
A late fitness test should determine whether either of the three are fit enough to feature against Jorge Jesus' side.
Ryan Bertrand is also on the plane despite a recent knee injury and will be hoping for another cup final win after his involvement in Chelsea's Champions League triumph in Munich last year.
Oriol Romeu and Nathan Ake also travelled with the first-team squad to the Dutch capital but are unlikely to feature against Benfica.
Demba Ba will travel with the squad even though he is cup-tied having featured in the tournament this season for previous employers Newcastle.