Chelsea defender Cesar Azpilicueta knows Europa League semifinal opponents Eintracht Frankfurt represent a massive challenge.

The Germans are a side he has regularly watched in recent months.

Azpilicueta said, "Eintracht dominated the group stage in the Europa League. They knocked out Shakhtar, Inter, Benfica.

"They play with very high intensity, with high pressure, and they put a lot of bodies in the box in the final third, so we expect a tough game from the beginning. We have to match this intensity. We know for both teams when you are so close to the final every ball is very important.

"Especially when you play away from home you have to be ready from the beginning. Both teams are very close to the final. It's something we have been working towards since September. Hopefully we can have a good game tomorrow."