Will Power held off a last-gasp surge by Tony Kanaan on IndyCar’s return to Road America to secure his second win of the season.

The duel between the pair was set up by the race’s only caution period when Conor Daly speared off the road at Turn 1 and into the barriers on lap 40 of 50, with a suspected rear brake failure.

That set up a five-lap dash to the chequered flag by the time the caution had been lifted, which Power led from the green flag.

Kanaan was third on the restart behind Power’s Penske team-mate Simon Pagenaud, but used a push to pass and the advantage of the grippier red tyres to clear Pagenaud for second, before Graham Rahal followed suit.

Kanaan brought down a 1.5-second lead to just 0.3s with two laps remaining, but Power fended off the Brazilian to deny Kanaan a first IndyCar win since Fontana in 2014.

Despite Pagenaud threatening to make a late-race charge for the lead with an impressive turn of pace before the final stops, he couldn’t make it last.

The Frenchman suffered further on the restart when he was passed by five cars in a handful of turns, eventually finishing 13th.

Ryan Hunter-Reay made the most of a few brave moves in the final two laps to outbrake Charlie Kimball and Helio Castroneves to finish fourth behind highest Honda-powered finisher Rahal, who was a clear third.

Scott Dixon started the race from second, but an engine issue five laps in caused him to retire.

RESULT – 50 LAPS:

Lights to flag win for Will Power, Dixon retires with engine issue