Yaya Toure has told BBC Sport that he wants to help Manchester City become the biggest club in the world.The midfielder has been a key figure for City, who attempt to clinch the Premier League title this weekend.He told World Focus: "That's why I came here, to help the team... to help the club go forward and make it bigger than any club in the world."City host QPR on Sunday and will become champions if they match Manchester United's result at Sunderland.Asked whether he was feeling the pressure, Toure, who was signed from Barcelona for a reported £24m in July 2010, said: "No, because I have a lot of experience. I have already won some important trophies."Toure, a member of the Barcelona squad that won all six domestic and international titles they contested in 2009, has been an increasingly influential figure for Roberto Mancini's side this season.The Ivory Coast international, 28, scored both goals in a 2-0 win at Newcastle on Sunday and also helped City beat neighbours United 1-0 on 30 April.Toure, who also scored in City's FA Cup semi-final and final victories last season, believes his know-how was one of the main reasons City agreed to pay such a big fee to sign him from Barcelona on a five-year deal."I think they made the right choice," said Toure, who once had a trial with Arsenal. "I wanted to come to the club to make a story and my decision was to come to City."Of course, some people make some speculation about other things, but, for me, when you are a football player, you always want to go where you can be loved and be the best player."At Barcelona, I was a good player but at City I am an important player for the team."City failed to reach the latter stages of the Champions League this season, but Toure says a first top-flight title since 1968 would be an important step on the road to becoming the biggest club in the world."This Sunday coming, we have to deliver," he said. "It's very important."Yaya Toure was speaking at the Best of Africa Awards in London.