Behrendorff would be a front runner to replace Hazlewood because of his ability to swing the new ball at the start of the innings which would be a nice left-arm option alongside Chahar at the start of the innings. Not too sure about this death overs bowling though, think his strength lies purely in the Powerplay at the start. Topley would be a very good option, he played the recent ODI series against India and I thought he bowled very well at the death. His height (6'7) allows him to get some extra bounce to cramp batsmen, which makes him a real genuine death overs bowler which CSK would like with an inconsistent Ngidi and a Bravo on the decline. Pretty much a matter of whether you want someone to bowl at the beginning of the innings, or have some cushion for the back-end.Lots of interesting names doled out on social media for the replacement - Nathan Ellis, Jason Behrendorff, Naveen Ul Haq, Topley, etc. Some have gone on and done an April fools by saying Alex Hales is already signed up as replacement I wouldn't go for a batsman right now to replace Hazlewood as the batting is overflowing with Indian guys. An overseas seamer would be better. I'm actually inclined towards Behrendorff, a good death bowler from what I've read of his work in recent BBL. We played on flatter wickets of Mumbai and Bangalore where Bangalore is also a tiny ground. A good death bowler can help with Bravo on the wane and Ngidi blowing hot and cold.
Hazlewood is a decent white ball bowler, he may have got more games this season but was rarely featured last season under Dhoni so I doubt he would've gotten the purple cap under him. I think CSK need a "hit the deck hard" type of bowler which will suit them playing at Wankhede. They could do with another death overs bowler but that specific type of bowler would complete their attack.