Chelsea defender Gary Cahill has predicted a tough test when his side take on former club Aston Villa today.

Cahill progressed through the youth system at Villa before moving to Bolton and was impressed with their performance against Liverpool last week.

"We face a team with growing belief, which won at Liverpool last weekend despite fielding its youngest 11 of the Premier League era," Cahill told Chelsea's official website.

"I thought they'd maybe struggle early on, but they've just had a fantastic result and begun to gain confidence and play some good football, so it will be a tough test."

The 27-year-old also highlighted Christian Benteke as a key player for today's visitors.

He continued: "He's had a good time since he moved to Villa. He's looked a handful and played regularly so he must be doing something right. He's scored some decent goals and he's certainly one to keep an eye on."

Chelsea welcome Aston Villa to Stamford Bridge at 4pm this afternoon.