World Championships bronze medallist Lakshya Sen’s giant-killing run ended with a straight-game loss to Thailand’s rising star Kunlavut Vitidsarn in the summit clash of German Open Super 300 badminton tournament here on Sunday.

Sen, 20,  who had claimed his maiden Super 500 title at India Open in January, lost 18-21 15-21 in 57 minutes to the three-time world junior champion Vitidsarn in the 
final match.