Williamson’s innings would have ended on 21 off 22 balls; he went on to score 85 off 48 balls
According to Luck Index, that dropped catch from Hazlewood cost Australia 28 runs; had Williamson been dismissed then, the algorithm reckons that New Zealand would have finished on 144 instead of 172. This calculation is done by allotting the extra 26 balls that Williamson played to the batters who remained unbeaten and those who didn’t bat in the New Zealand line-up (according to a logic that estimates the number of balls they would have faced).
The algorithm thus estimates that instead of the 64 runs that Williamson scored off those 27 deliveries, the other New Zealand batters would have managed only 36 off those.
S Rajesh is stats editor of ESPNcricinfo. @rajeshstats