El-Hadji Diouf has signed an 18-month contract with Leeds

Leeds have confirmed the club has given El-Hadji Diouf an 18-month contract after the striker's impressive start to the season.The former Liverpool and Blackburn player originally moved to Elland Road on a non-contract basis in the summer before signing a deal until January.United manager Neil Warnock has been delighted with Diouf's influence on the pitch, where he has scored five goals since his arrival.The 31-year-old is now contracted to the West Yorkshire giants until the end of the summer of 2014. Warnock said: "We're delighted he's agreed everything and hopefully he'll enjoy the next 18 months with us."Obviously it's a massive boost for everyone to know we're going to have him around, and this is what we've wanted to do."He's a match-winning player, and there aren't many of them around. He's a player who can change a game and I'm delighted we've been able to keep him."He's also fitted in really well, and he's been great with the lads."