Serena and Halep face major test of ‘chill’ and ‘calm’ approach

Former world number ones Serena Williams and Simona Halep say keeping their composure will be key when they meet in the final at Wimbledon. Serena Williams and Simona Halep plan to "chill" and stay "calm" in the heat of a Wimbledon final battle on Saturday but that could be easier said than done. Williams will …