The South African started out slowly until he came face to face against Hazlewood.
Hazlewood began with an attempted yorker that Klaasen tonked after taking his leg out of the way.
Hazlewood followed that up with an uncharacteristic slot ball that Klaasen launched into the midwicket stands.
Hazlewood looked like he nailed his wide yorker, but Klaasen was able to stand his ground and throw his bat at it to send it behind point for a four.
A full toss followed that was sent for yet another six to cap off a 27-run over - the most Hazlewood has conceded in T20s.
The South African started out slowly until he came face to face against Hazlewood. RCB looked like they could pull the game back a little as Romario Shepherd bowled a five-run over, but Klaasen more than made up for it against the Aussie ace in the 13th over. Hazlewood began with an attempted yorker that Klaasen tonked after taking his leg out of the way. Hazlewood followed that up with an uncharacteristic slot ball that Klaasen launched into the midwicket stands. Hazlewood looked like he nailed his wide yorker, but Klaasen was able to stand his ground and throw his bat at it to send it behind point for a four. A full toss followed that was sent for yet another six to cap off a 27-run over - the most Hazlewood has conceded in T20s. Against Bhuvneshwar in the 15th over, Klaasen smashed one over extra cover to take his season tally past 600 runs.