Adam Lallana
Adam Lallana scored his first goal for Liverpool against West Bromwich Albion.Getty

Liverpool summer signing Adam Lallana says he is "getting closer to the levels he was playing at last season for Southampton" after struggling to make an impression at the start of his Anfield career.

The 26-year-old was considered one of the Premier League sensations last season earning a call-up to Roy Hodgson's squad for the World Cup before securing a £25m move to Merseyside.

However, the English international has since failed to push on in Brendan Rodgers' side after a pre-season injury hampered his start at the new club forcing him to sit out the first six weeks.

The midfielder, however, is still confident of regaining his Southampton form on Merseyside.

"Gradually, the more games I've played and the more minutes I've accumulated, my form has improved and I'm getting closer to the levels I was at last season for Southampton. There's still an improvement to be made but I'm getting there," he said on Liverpool official website.

"When you've been away for seven or eight weeks, the pitch feels a bit different when you step back on it for the first time.

"It's a case of getting your head down, working hard and doing the things that have made you successful before to get back to a level where you can affect matches."

The midfielder says that swapping Southampton for Liverpool has been a big change.

"I always knew it was going to be difficult settling in, especially with the injury. Playing for a new club the size of Liverpool and having Champions League football -- you need to be tough mentally.

"I was so desperate to do well, maybe trying a bit too hard to impress, not doing things that I'd normally do, thinking about things maybe a bit too much. You can't always expect to be at your best straight away."