Romeu featured in their friendly against Real Mallorca B yesterday.
"I was speaking to some friends I have at the club here after training," Romeu explained to chelseafc.com. "It's good to see them again and it has given us the chance to speak to each other about how our careers are going. It's been a long time since I saw the guys here and to speak to them and exchange training shirts with them is really nice.
"It's been good to return to Spain for a few days with Chelsea. We have spent a few good days here now and it has been nice weather, a nice town and, I think, to disconnect from things in England has been very good for us."