Azpilicueta is first choice Mourinho’s starting line-up after a difficult start to the season. [Reuters]

Chelsea defender Cesar Azpilicueta has called for calm after Jose Mourinho's side second Champions League defeat to Basel.

The Blues have secured a place in the knock out stage but in Switzerland they produced one of their worst performances of the season - conceding an 87th-minute Mohamed Salah goal that leaves Basel needing a point to join them in the last 16.

Chelsea lost against Basel at Stamford Bridge earlier in the group phase and must now beat Steaua in their final game to assure they are seeded for the knock-out phase.

"Do not alarm for this defeat. If we win the last game that we have at Stamford Bridge we will finish on the top of the group, which is the target. And we are third in the Premier League -with the same points than the second," Azpilicueta told Spanish newspaper Marca.

"In London Basel won us with a strategic move and in Basel they have scored a goal at the end with a long ball. They have done two good games and we have not been fine today," added.

However, the Spaniard believes there is no reason to panic because Chelsea are in a good position both in the Champions League and domestically.

The versatile 24 year old is currently first choice in Mourinho's starting line-up after a difficult start to the season after not featuring any of Chelsea's first 10 Premier League games.

However, he has started the last four games playing at left back in place of Ashley Cole.

"Individually, I am happy for playing and collectively we are Chelsea and we have to aim for the best."

According to Marca, Azpilicueta was the only Chelsea player, with Gary Cahill, who spoke to the media to explain the defeat to Basel. The rest of the squad were unwilling to talk.