Spurs ended their toughest run for years - seven straight defeats in all competitions - by beating Oxford United last time out in WSL 2 on Sunday 11 February.
Now they take on WSL 2's bottom team Watford at Cheshunt FC (7.30pm) knowing back-to-back victories could lift them into fifth with Oxford, currently fifth, facing a tough away test at Brighton.
Karen felt all along that the players would turn their fortunes around, but has warned against any complacency tonight.
"The players have given us everything in training and the matches and I felt it was just a matter of time before we won again," said the manager.