New Delhi: Impressed by Mohammed Shami and Umesh Yadav's "mature performance" in the ongoing World Cup, former Pakistan pacer Shoaib Akhtar feels the duo are on the path to become "world-class" bowlers and have been the key to India's success in the tournament.


Umesh Yadav. Inset: Shoaib Akhtar 

The pace duo shared four wickets between themselves as India humbled Ireland by eight wickets in their previous league encounter to register nine consecutive World Cup wins and also confirm their top spot going into the quarter-finals.