Burnley suffered a cruel defeat at Turf Moor as Arsenal secured victory with a controversial Laurent Koscielny goal in the final act of an intriguing match. In added time, Theo Walcott headed across goal towards Alex Oxlade-Chamberlain whose effort went in off what appeared to be Koscielny's elbow. As well as a possible handball, there was also a hint of offside with captain Koscielny standing on the goalline. Michael Keane had Burnley's best chance, heading on to the crossbar.