The 40-year-old Razzaq represented Pakistan in 46 Tests, 265 ODIs and 32 T20Is between 1999-2013.
Speaking about Bumrah, Razzaq added, "Bumrah is doing very well and has improved a lot. He has an awkward action and hits the seam perfectly which is why he is effective."
India's frontline seamer Jasprit Bumrah is currently the Numero Uno ranked bowler in the world in one day international cricket. Recovering from an injury that sidelines him from the recent tours of South Africa and West Indies, Bumrah is working hard to regain his strength and fitness under Delhi Capitals trainer Rajnikanth Sivagnanam.
Bumrah missed the series against South Africa and Bangladesh due to a stress fracture -- went through an assessment post the Diwali break which revealed that his recovery is on track and he is likely to be available for the New Zealand tour.