The striker's switch has not helped team harmony, with Newcastle just two points off the drop zone and facing a tricky FA Cup test at Brighton tomorrow.
Team-mate Krul, though, said: "Fair play to the lad for going to Chelsea. He has been magnificent for us and deserves his move.
"I don't think we're shell-shocked about that because we knew it was hanging over us anyway.
"As long as we get a good replacement, that's the most important thing."