Chappell, who arrived in Islamabad on Wednesday on his second 10-day assignment with the National Cricket Academy, said professional attitude in all departments of the game was essential for building a strong team.
Central contract system was also a step towards professionalism and it would make the player feel more secure, he was quoted as saying in The News.
Chappell said Australians dominated the game because not only were they talented, but also 100 per cent professional.
"They can dominate for next three to five years although it will not be an easy task," he said.
Comparing different teams, he said the Indians were improving fast. Pakistan could still give tough time to Australians while England, the traditional rival of Australia, were far from posing any real challenge to the Aussies.
On the NCA, Chappell said the academy was necessary but it could only be beneficial when supported by a strong domestic system, flawless cricket structure and ideal atmosphere.