Iwelumo scored 16 goals in his first season at Molineux
Wolves striker Chris Iwelumo could miss the start of the season after breaking his metatarsal in his club's first friendly on their tour of Australia.
The 30-year-old Scotland international was injured in a tackle with Jacob Burns after 18 minutes of the match.
Iwelumo has just returned from a knee ligament injury, which ruled him out of the final five matches of Wolves' Championship title-winning season.
Wolves won the match 1-0, with Sylvan Ebanks-Blake scoring the only goal.
All six of Mick McCarthy's summer signings - Nenad Milijas, Marcus Hahnemann, Kevin Doyle, Andrew Surman, Greg Halford and Ronald Zubar - played a part in the match.
Iwelumo, a £400,000 signing from Charlton in the summer of 2008, scored 16 goals in his first season at Molineux - albeit 15 of those came by the end of November, as Wolves secured their return to the Premier League.
Wolves open the new season with a home game against West Ham on 15 August.
Scotland travel to Norway three days earlier for a vital World Cup qualifier.
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