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IndyCar has abandoned its second scheduled practice session for this weekend's season-opener in St Petersburg due to bad weather.

The afternoon session was initially delayed due to standing water left by earlier rain, which the series attempted to clear with sweeper trucks.

However the rain returned a few minutes later, eventually prompting race control to throw the chequered flag.

Is IndyCar out of the wilderness?

Earlier in the day, Will Power gave the manufacturer aero kits a memorable race weekend debut by cutting 0.4 seconds out of Takuma Sato's 2014 pole time in the first practice session; an outing that ended with an all-Penske top three, and an all-Chevrolet top five.

The cars are scheduled to return to the track for third practice onSaturday before qualifying later in the afternoon.

Follow the 2015 IndyCar season-opener as it happens with AUTOSPORT Race Centre Live from 8pm UK time on Sunday March 29