Jose Mourinho admits Chelsea could find it difficult when they take on League Two high-flyers Shrewsbury in the Capital One Cup on Tuesday night because it is a “big day” for their opposition.

Chelsea travel to the Greenhous Meadow Stadium looking to book their place in the quarter finals of the cup but Shrewsbury are relishing the chance to cause an upset.

It is their biggest Capital One Cup fixture since 1961 and the club have installed temporary seating at their ground to break the 10,000 capacity barrier for the first time.

The Shrews will be roared on by a bumper crowd after hitting a fine run of form in League Two and Mourinho insists his team will respect the lower league opposition.

“It’s a big day for them. We know it will be difficult,” he is quoted as saying by West London Sport. “Every game is important. We have to play matches with respect.”

It is Chelsea’s second competitive fixture in 48 hours after drawing

1-1 with Manchester United on Sunday and Mourinho is likely to make a number of changes, however he says it will still be a strong squad in Shropshire.

“We will go there with a good team,” he added. “If they win they win, but they win against a good team.”

Shrewsbury upset Premier League opponents Leicester City in the last round and have won their last four games in a row in League Two to rise up to fourth in the table.

They are 9.12 to cause another upset on Tuesday night while a draw is 6.10 and Chelsea are priced at 1.24.