Russell Martin says Swansea City's goalless draw with Birmingham City has reinforced his desire to bolster his squad in the summer.
The Swans were without Jamie Paterson and Flynn Downes for the clash with Lee Bowyer's men and lacked energy throughout having faced Peterborough United away from home just three days earlier.
The Blues created the better opportunities in south Wales, although Swansea held on to claim a point and register their 14th Championship clean sheet of the season. And Martin says the blunt display fully exposed the lack of depth in Swansea's squad.
