To their credit, Reading continued to look for a way back into the match after the home side went 3-0 up, Laurent Koscielny needed to make a last-ditch tackle on Pogrebnyak.
Arsenal switched off, which allowed Reading to pull a goal back as Jobi McAnuff floated cross from the left was headed in at the far post by Robson-Kanu with full back Nacho Monreal clattering into the woodwork,
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Another unseasonably warm day, with low cloud and mist clearing to leave long sunny spells.