Sunderland boss Tony Mowbray insists Luton will be formidable opponents as they prepare to meet in the Championship play-off semi-final.
Helped by Blackburn's victory against Millwall, the Black Cats sneaked into sixth place while the Hatters finished third.
Both sides have recent play-off experience, with Sunderland promoted into the second tier with a win against Wycombe in last year's League One play-offs.
However, Luton missed out on the chance to earn Premier League promotion after losing in last season's semi-finals to Huddersfield, but Mowbray insisted the Hatters will be aiming to 'put that right'.