Daniel Agger says Liverpool are brimming with confidence following their 2-1 victory over Manchester United in the FA Cup on Saturday.
The Dane had given Liverpool the lead at Anfield when he made the most of David De Gea's hesitation to head home a corner from captain Steven Gerrard.
Park Ji-sung restored parity before half-time when he crashed home a cross from Rafael da Silva after some neat work from the Brazilian on the right flank.
Liverpool, though, sealed victory in the fourth round encounter when Dirk Kuyt fired Andy Carroll's flick-on past De Gea and into the bottom corner.
The win against United was Liverpool's second cup triumph in less than a week, after the Reds progressed into the final of the Carling Cup after getting the better of Manchester City over two legs.
And Agger senses the tide is turning at Anfield after some stagnant form in the league, and believes a cup double could be on the cards this season.
"We defended well and they didn't really have that many chances," he told Liverpoolfc.tv.
"They had a lot of possession, but not a lot of chances.
"We did well. United are a tough team to play against with good footballers. I don't think you can talk about who deserved to win because it's football and anything can happen.
"It's been the perfect week for Liverpool in the cups, definitely. We got what we wanted.
"We always take confidence going forward when we win, but to win in the cup and get through to the next round gives you more confidence."
Liverpool will now face Brighton at Anfield in the FA Cup fifth round, with the tie due to be played over the weekend starting February 18.
Gus Poyet's side beat Newcastle 1-0 at the Amex Stadium on Saturday evening to secure their passage into the next round.