The Spain international won the club's Player of the Year award last season but there was speculation he may leave during the summer transfer window.
It was suggested that Mata would not fit into the plans of new Blues boss Jose Mourinho and that the Portuguese was ready to sell him.
Manchester United and Arsenal were linked with a move before PSG were supposedly ready to launch a deadline day bid to lure him away from Stamford Bridge.
All those rumours transpired to nothing, but Mata has revealed he didn't want to leave the club anyway.
The 25-year-old accepts that transfer speculation comes with the game but insists he is happy at The Bridge.
"I think it's normal in every transfer window that there are lots of rumours but I'm happy here," he told the club's official website. "It's been a very, very good two seasons for me here, maybe the best of my career, and what I want this season is the same.
"I'm looking forward to achieving as many trophies as we did the last two seasons (Champions League and FA Cup 2012, Europa League 2013) and hopefully this is going to be a good season for us again.
"Has it been hard for me to focus on my football with all the speculation? For me it's not, if you have things clear in your mind and have belief in yourself. My only aim is to play here, grow as a player and do as good a season as the last two which were amazing for me."