Chelsea striker Diego Costa is delighted for former club Atletico Madrid over their season start.

Atletico currently sit top of the table.

"I always follow Atlético and watch what they're doing," he told reporters on arrival in Las Rozas.

"They're doing really well and I am so happy for them. Atlético have been at this level for a few years - battling for every trophy and beating the best sides. I'm not surprised because they're a top side and they deserve it."