Bar Refaeli sports sexy bikini in new Sports Illustrated promo

Israeli model Bar Refaeli left little to imagination after sporting a tiny bikini to promote the new Sports Illustrated issue in an advertisement.

Leonardo DiCaprioĆ¢€™s girlfriend, who graces the cover of the 2009 issue, is seen lying on the beach against the waves in the promo for the magazine, reports The Sun.

The stunning 23-year-old had posed almost half naked for the cover and was seen posing in a string bikini, carefully pulling one of the thin straps down her hip.

Refaeli has previously stripped for swim-sports label Hurley.