Currently at the top spot, Pakistan's ace spinner Saeed Ajmal was suspended from bowling by the ICC on September 9. Not only his 'doosra', Ajmal's off-spinner was also declared to be illegal.

An independent ICC analysis revealed that all of the Ajmal's deliveries exceeded the 15 degrees level of tolerance permitted under the regulations.

The 37-year-old off-spinner is undergoing remedial work on his bowling action and vows to make a comeback to the international arena.

Sunil Narine of West Indies, the second best bowler in the world in ICC's ODI ranking, was reported twice for a suspect action during the last year's Champions League T20 and was later barred from bowling.

The off-spinner has also withdrawn his name from the West Indies World Cup squad, saying he needed more time to work on his remodeled action.

Narine has undergone intense remedial work on his action and preliminary tests have shown him bowling all his deliveries under the 15 degrees flexion allowance now.

Pakistan's Mohammad Hafeez takes the eight spot on the list and faces a similar bar from bowling as that of Sunil Narine.

Hafeez’s arm both around and over the wicket exceeded the limit of 15 degrees. Over the wicket, Hafeez turned his arm at angles measuring from 16 to 18 degrees while around the wicket it ranged between 12 and 19 degrees.

Hafeez has also failed to clear two unofficial bio-mechanics tests conducted to assess the legality of his bowling action.

ICC's crackdown on bowlers, especially spinners, was not received well by many experts of the game.

Former West Indies captain and batting icon Viv Richards believed the ICC’s crackdown on bowlers with suspect actions has come at the wrong time and it should have been done a while ago.

“In my opinion such action should have been taken some time ago and on a wider basis because these guys have been there for quite some time,” Richards had said.

Former Pakistan all-rounder Azhar Mahmood had also questioned the timing of the decision when the ICC had referred Ajmal for a suspect bowling action.

“It's not fair when they say he's not bowling with a legal action ... He's been playing cricket for so long, so why now?” Mahmood had said.