Sunderland boss Martin O'Neill has big concerns over his striker options.
O'Neill lamented: "We know where the problems are. You just need to look at our scoring record last season.
"This puts pressure on other players to score goals, either from set-pieces or from the midfielders.
"Eventually centre-forwards have to weigh-in with them and, at the moment, you would want to know who is going to score 15 goals in a Premier League season - and when that will happen."