STOCKHOLM, Sweden (AP) _ Helena Lundback of Sweden, riding a borrowed horse named Mynta, edged Britain's Robert Whittaker by less than two seconds in a jump-off Sunday to win the Grand Prix at Stockholm's International Horse Show.

Lundback's time was 32.19 seconds in only her second competition aboard Mynta. Her previous horse, So What, was bought by an American before competing in the Sydney Olympics.

Whitaker, aboard Think Twice II, also had a faultless ride before another sellout crowd of some 14,000 at the Globen Arena. The three-day meet, Europe's best attended, drew nearly 70,000 fans.

Lars Petersen of Denmark won the World Cup dressage event on Blue Hors Cavan.

Isabell Werth, the Olympic silver medalist from Germany, finished third aboard Anthony FRH and leads the World Cup standings.

Whitaker's father, John, suffered a stroke before his scheduled start Friday and ``his condition continued to improve,'' hospital officials at Uppsala University Hospital said Sunday.

John Whitaker, 45, a three-time Olympic silver medalist, was rushed to the hospital before his ride.

Britain's most famous show jumper ever along with his brother, Michael, John Whitaker won an individual silver medal at the World Championships in Stockholm in 1990.

In Olympic show jumping, Whitaker won individual and team silver medals in the 1980 Moscow Games. Four years later, he won another team silver in Los Angeles.

In partnership with Milton, perhaps the most popular horse ever in show jumping and the first to top $1.4 million in prize money, Whitaker won the World Cup final twice, one European championship and many other competitions.