United went behind on three occasions in the 3-3 all draw, with Diouf scoring twice and Federico Macheda scoring a penalty to take the game to a shoot-out.
Ben Foster, Macheda and Rodrigo Possebon all scored for United, with Corry Evans and Will Keane seeing their efforts saved. However, Foster made two saves and United were named the winners.
The RoM 2017-18 Season Preview is available for just £5. It includes an EXCLUSIVE interview with Paul Scholes, a Q&A with the country's top journalists about our transfer targets, articles by brilliant United writers, and so much more. All profit goes to Trafford Macmillan so please support this fantastic cause.