The midfielder has call for his side to improve following the Portuguese's exit at Stamford Bridge and insists 'better days will come'
Juan Mata has admitted it has 'not been easy' following the dismissal of Andre Villas-Boas on Sunday and has urged his Chelsea team-mates to improve the situation at Stamford Bridge.
The 34-year-old was sacked after a string of poor results that culminated in Chelsea's 1-0 loss at West Brom on Saturday.
Chelsea, who sit fifth in the Premier League, have appointed Roberto Di Matteo as interim manager until the end of the season.
Mata, who was brought to Stamford Bridge by Villas-Boas in the summer, thanked the former Chelsea boss for his time at the club.
"It hasn't been an easy day for those who, like me, are part of Chelsea," read a post on Mata's official Facebook page.
"I would like to thank the manager and wish him luck.
"We have to keep working hard and better days will come. Thanks for your support!"
