"We're really happy and really pleased," said Martinez. "January is one of those windows where, if you haven't performed well, you need to find a change and bring players in. But it's a big risk and sometimes clubs need to take that risk. In our position, it's different, you want to keep that stability.
"In January, if you want to bring players in, they need to add something extra but to bring in people of the quality you already have in the dressing room is nearly impossible.
"We have two outstanding footballers in Aiden McGeady and Lacina Traore, so we're really pleased with what we've done."