MONZA, Italy (AP) -- Defending champion Rikard Karlberg of Sweden led local favorite Francesco Molinari by one stroke in the first round of the Italian Open on Thursday.
Karlberg shot a 7-under 64 at the Golf Club Milano, next to Monza's Formula One circuit.
Thunderstorms delayed play for several hours and a good chunk of the field did not complete their rounds, or even start.
Italian amateur Federico Zucchetti was among several players at 4 under.
Karlberg rolled in an 18-footer for an eagle on the ninth, his final hole of the day.