Two capsizes has seen Peter Burling slip down the leaderboard at the Moth class sailing world championships on Lake Garda in Italy.

The Team New Zealand America's Cup winning helmsman has slipped from fifth to 15th after an eighth and an 11th in two races today.

In a day where several world class sailors struggled with the conditions, Burling tipped over twice on the Italian course, losing time on the leaders.

Defending champion England's Paul Goodison continues to lead the regatta, having won all four of his races so far.