Karachi: Pakistan head coach Dav Whatmore has stopped short of making claims that his team can win World T20 trophy, but seemed confident that his wards will put their best foot forward during the three-week tournament in Sri Lanka starting September 18."We have already set the momentum. I am confident my boys will carry it into the World Cup," he added.Although Pakistan â who recently won their T20 series against Australia â are being seen as a strong contender for the title, Whatmore insisted anything could happen in the T20 format. "Other teams have also started to take this format seriously and have built specialist teams for it," he told Geo News Channel."We did well against Australia, but T20 is a volatile format. One over can change the course of the game. It is a format where a player or a team has to be at their utmost best and that too within a short span," Whatmore added.The coach is also under pressure to deliver after reports that he too has fallen under the influence of Mohammad Hafeez and other senior players and is unable to take independent decisions. Whatmore also said Saeed Ajmal would play an important role for Pakistan in the World Cup. He pointed out that Ajmal was a good bowler, who could get wicket on each ball.Replying to another question, Whatmore said that he expected good performance from all players in each match and in the warm-up games against India and England. "Although it is a practice match against India, the victory in this match is important," he said.The national cricket team coach also said that there might a few changes to the side that beat Australia in the recently concluded twenty20 series. Pakistan has picked a combination of senior and young players for the tournament which it won in 2009 in England under Younis Khan's captaincy. It also lost in the final of the inaugural World T20 in South Africa in 2007 to arch-rivals India.Experts and analysts believe that the current tournament could be a make-or-break one for many of the senior players, including Shahid Afridi, Abdul Razzaq, Imran Nazir and Umar Gul."Some of the younger players are also under pressure to perform in the event, notably Umar Akmal whose inconsistency remains a big problem," a source informed.