Scotland internationalist Steven Fletcher and his fellow Sunderland strikers have been told by manager Gus Poyet they should consider themselves 'not good enough' if they do not reach double figures this season.

Poyet has grown increasingly frustrated by his team's failure to find the net this term, with their return of just 14 in 16 Premier League outings contributing to their lowly 15th place in the table with a goal difference of minus 10.

The Black Cats have lost only four times but have drawn 10 of 16 league matches and, with Fletcher top scorer with four goals, boss Poyet has warned his strike-force they must improve.

Poyet himself scored 49 times in 145 appearances during his four-year spell with Chelsea but was subsequently less successful in three years at Spurs, where he scored three times and six times in his last two seasons.

The 47-year-old former Uruguay forward told the Sunderland Echo: "Every season, I started the season thinking if I didn't score double figures I wasn't good enough. Now, the people up front need to find that.

"You need to find a way and that's frustrating. It's a part of the game that I doubt I can improve dramatically. I can help them, but it's out of my hands."