Sumit Nagal goes down to Stanislas Wawrinka in Prague

India's Sumit Nagal gave a mighty scare to three-time Grand Slam winner Stan Wawrinka by taking off the first set but then wilted under pressure to bow out of the Prague Open in the quarterfinals on Thursday. The 23-year-old Indian bagged the first set 6-2 in stunning fashion after breaking the Swiss heavyweight's serve to raise...