Since beating Arsenal 4-0 on Aug. 27 to take their early-season tally to 14 in five matches, Jurgen Klopp's side then scored eight in eight, with three of them coming in one game against Leicester.

But Netherlands international Wijnaldum, speaking after Liverpool scored seven at Slovenian side Maribor in the Champions League on Tuesday, said: "We were a little bit sad that we didn't score a lot of goals [previously] as we created a lot of chances.

"The manager told us if we play like that, creating a lot of chances and are maybe more ruthless, then we would score goals.

"We just kept the belief and played how we always believed -- just being more ruthless."

The Maribor result provided a big confidence boost heading into Sunday's trip to Tottenham Hotspur.

But Wijnaldum warned: "I am not the person to say: 'Today we scored seven and the next one we will do the same again.' Every game is different.

"Every game you have to work hard and show your best to score goals and win the games.

"Against Tottenham it will be a good game, but we have to wait for that."

Trent Alexander-Arnold scored his first goal in a full Champions League game, having netted a brilliant free kick in their playoff against Hoffenheim.

"It's always a good day when you score your first Champions League goal," he said.

"A positive side to my game is attacking and I try to do that as much as possible.

"It is always a proud moment to score for Liverpool -- two Champions League goals is a really good moment for me."