By Felix Keith Declan Rice has denied rumours that he soiled himself during Arsenal’s match against Porto after a picture of his shorts went viral. Rice helped Arsenal reach the quarter-finals of the Champions League on Tuesday night by overcoming Porto on penalties. It was a joyous night for the Gunners, yet their star midfielder was setting tongues wagging for a very different reason. Eagle-eyed fans couldn’t help but notice a brown stain on Rice’s white shorts while he was preparing to take a corner. Many suggested he had followed in Gary Lineker ’s footsteps by soiling himself on the pitch…