Worcester Warriors only win in their last four games was 19-9 at home to Newcastle on 23 March.
The Warriors’ five match winning run at Sixways in all competitions ended at the hands of Exeter on Saturday.
London Irish have slipped to seven straight defeats in Aviva Premiership Rugby – their worst ever sequence in Premiership history. The Exiles have won just once on the road this season in the tournament: 14-13 at Northampton in round three.
The Warriors are winless in their last ten Premiership encounters against London Irish since their 20-15 victory at Madejski Stadium on 11 September 2005.