LONDON, Nov 29 - Spain's chances of making this weekend's three-way SailGP final slipped on Saturday as Diego Botin's defending team lost ground to their nearest rivals Australia in the overall championship.

Light winds made for a tactically challenging contest for the 12-boat fleet, with speeds at a relative snail's pace for the F50 catamarans which in stronger breezes are capable of "flying" above the water at more than 100 kilometres per hour.