The 32-year-old believes a repeat of Sunday's performance against Norwich at the weekend will secure the Reds an all-important first victory.
"We played really well today with 11 men and we played even better with 10," he told Sky Sports. "So we're disappointed to come away from the game with nothing. We showed great determination.
"You can't fault any of the players in our dressing room, they gave everything they had. But sometimes that's not enough against quality teams like Manchester United and they managed to get themselves in front after we took the lead.
"If we keep playing like that and showing that amount of effort and determination, then it will only be a matter of time [before we get our first win].
"If you analyse all of our performances, it's not that we haven't been playing good enough - maybe we just need a bit of luck. We'll keep plugging away and it will come eventually.
"But we know that we need our first win very quickly. It needs to be next week at Norwich."