Chelsea manager Jose Mourinho was full of praise for striker Diego Costa who scored his seventh goal in four games for the Blues.
The Spain international was in superb form against Swansea as he scored his first Chelsea hat-trick with the manager impressed by the 25-year-old's quality.
"Seven goals is a surprise," Mourinho told Sky Sports.
"Nobody expects one player to score seven goals in four matches, and they’re not penalties, it’s from free play.
"Everybody was expecting him to succeed, to feel comfortable, to adapt to our team and to our Premier League.
"To score seven goals is obviously a fantastic record."
It was Chelsea's fourth win in as many games as they lead the Premier League table with 12 points.