LONDON: Alexander Isak said Liverpool have "still lots to improve" after the Swedish striker scored the winner to edge out nine-man Brentford 2-1 on Saturday.

The Reds fell behind in west London to Keane Lewis-Potter's header but the game turned just before half-time when Yehor Yarmoliuk was shown a straight red card for a headbutt on Jeremy Jacquet.

Liverpool made their man advantage count as Victor Munoz levelled before Isak rifled in his fifth goal of the season on his return from injury.

But the visitors struggled to see the game out comfortably, even after Vitaly Janelt saw a second yellow card in stoppage time to reduce the Bees to nine men.