Everton star Tim Cahill says he is always looking to improve his game. The Australian international, who has one of the best goalscoring strike rates for his country in world football, admits that high expectations make each and every game harder to perform but admits he enjoys the challenge.

"Whenever I play for Australia and for Everton I always try to play to the highest level and am always finding ways to try to make myself better," Cahill said.

"It gets harder every game and every year because people expect more from you. They expect that winning goal or something different."

The 29-year old has scored on 19 occasions from 36 appearances for Australia which rates just behind Brazil's Luis Fabiano, Ivory Coast's Didier Drogba, North Korea's Chong Tese and Switzerland's Alexander Frei as the best scoring strike rates of the nations that have already qualified for the 2010 World Cup in South Africa.