Andrew Surman says his Southampton teammates only need to glance along the south coast to know that the FA Cup is full of surprises.

The midfielder will line up against struggling League Two side Bury in the fourth round at St Mary's tomorrow, a game Saints are overwhelming favourites to win.

But Southampton's neighbours Havant & Waterlooville have proved that the form book has little worth in the Cup, upsetting Swansea en route to a dream tie at Anfield.

"We won't be taking anything for granted," said Surman, who scored in his side's third round win over Leicester.

"We are expected to win but everyone knows the FA Cup is a different story. Havant & Waterlooville are four leagues below us but are playing at Anfield and are at the same stage of the Cup as we are."

Southampton have endured a frustrating season so far. Currently languishing mid-table, Saints' form has picked up in recent weeks but the departure of George Burley will not have done their match preparations any good.

Surman hopes his side can put things right - just as they did in the last round.

"We went into the Leicester game off the back of two disappointing results," he said. "We had played Preston and Colchester, who were at the bottom of the league, and only got one point. It was quite a difficult Christmas period.

"It was nice to score. I didn't get much power behind my volley and thought the keeper might have saved it. I'll take it though!"

The managerial merry-go-round has hit Bury too - Chris Casper paying the penalty for a dismal run of results which sees the Gigg Lane outfit flirting with relegation.

Caretaker manager Chris Brass has fared better, guiding the Shakers to a shock Cup victory over Norwich and a draw with fellow strugglers Bradford.

But Surman is in no mood to help Bury out and hopes one day to take Saints to a Cup Final, replicating the feat of 2003 when Southampton lost to Arsenal.

"I went to that final," said Surman. "That was a great day - the atmosphere was great. Hopefully we can get back there one day."