ANTWERP, Belgium (AP) -- Officials say three spectators were kicked out of the Diamond Games tennis tournament in Antwerp because they were betting on a match online from the stands. The WTA Tour is taking a tough stance against gambling at tournaments, especially after betting scandals on the ATP tour have tarnished the sport. The WTA Tour says as many as six of its players have been approached to throw matches but insists that no match outcomes have been affected by gambling so far.