Swansea have the most porous defence in the Premier League but there was no way through for Middlesbrough's shot-shy attack.
Swansea City edged a point clear of the Premier League relegation zone after their basement battle with Middlesbrough ended in a forgettable 0-0 stalemate.
Middlesbrough, playing for the second time under Steve Agnew following Aitor Karanka's dismissal as head coach last month, were unable to improve their return as the top flight's most shot-shy attack – even when faced with its leakiest defence.
The Swans carried the greater threat, with Boro keeper Victor Valdes working hardest for his clean sheet by keeping Jordan Ayew and Gylfi Sigurdsson at bay either side of half-time.