Johnson: Diarra brilliant Portsmouth addition
"But even the foreign guys understand how important the FA Cup is and Diarra is a brilliant addition to our squad.
"I know him from our time together at Chelsea. He is like a young Claude Makelele with pace and strength. Me and him have been down the same road. We moved to a big club and didn't really get the chance to show what we could do.
"But we're happy to have him here and it is good for Lassana to be playing every week."