If Sunderland stay up this season they will have Jermain Defoe to thank for it. At 34 years of age he is showing no sign at all of fading, with his brace at Crystal Palace taking him to 14 league goals for the season.

David Moyes's team are utterly reliant on their talismanic goal-scorer, but are they the ultimate one-man team in Premier League history?

Here, we count down the 20 teams for whom one player scored the highest proportion of their goals in a season. Obviously Defoe has 14 games still to play this season, but he doesn't look like he'll stop scoring any time soon.