Cape Town - Imran Tahir is keen to impress in the England series after former England captain Michael Vaughan hinted the Proteas lack a decent spinner.Vaughan said on Twitter last week that England's bowling attack is better than South Africa's largely due to them having a far superior spinner.“England’s bowling attack is the best in the world. Would not swap it for any other. Not SA. Swann is the difference. Cheers,” tweeted Vaughan, referring to off-spinner Graeme Swann being the crucial difference.In response Tahir told Beeld he is determined to prove Vaughan wrong."I saw Vaughan's comment and will remain quiet for now."But he can know that he will be the first one I'll call when we win the series," said Tahir.England are the current leaders on the ICC Test rankings, but a series win for the Proteas will see them usurp their old rivals into top spot."This will be our most challenging tour in a long time and probably the most important I'll play in," said the 33-year-old Pakistani born, who recently signed a new deal with the Lions in Johannesburg.Tahir has not made the best start to his Test career. In seven Tests for the Proteas he has taken only 18 wickets at an average of 37.05, but believes the conditions weren't the best for his type of bowling."There was a lot of pressure on me when I made my Test debut because everyone expected me to take five wickets every game."But all my Tests were in South Africa or New Zealand - not really places where spinners fare well," said Tahir.In his defence, he had to try and outshine a rampant trio of Vernon Philander, Dale Steyn and Morné Morkel in the wickets column the past summer.