Ross Barkley 's through - ball was intended for Lukaku which in turn led to defenders Chris Smalling and Antonio Valencia doing the same .
Lukaku halted his run when he realised he was offside .
Ross Barkley 's through - ball was intended for Lukaku , who halted his run when he realised he was offside , which in turn led to defenders Chris Smalling and Antonio Valencia doing the same .