Alexis Sanchez says he made the right decision to join Arsenal from Barcelona as he plots his former club's downfall in the Champions League.
Sanchez joined the Gunners from Barca in a £35m deal in 2014, and he has been a massive hit in north London.
Sanchez did not win the Champions League title in his three years at Barcelona - they won the competition the season before he joined them from Udinese, and they won it again the season after he left for England.
Arsenal host the defending champions in the last-16 first leg clash at the Emirates on Tuesday, and Sanchez says he has no regrets about leaving the Catalan giants.
"It wasn't easy to leave Barcelona," he told the Sunday Mirror. "I fulfilled a dream when I moved there - to play in Spain and for the champions - but very few players stay in the same club all their life. To leave is normal.
"I wanted a new project, a new experience. And with so many attacking players at Barca it was a good choice to go... it has been a positive move and I love it at Arsenal."
Sanchez admits Arsenal face a tough task in knocking out the favourites - and stopping Lionel Messi in particular.
"We know it won't be easy. [Messi] is the best footballer in the world, without a doubt. It's very difficult to stop him but we will work on it. And remember, Barcelona is not only Leo…"