New Delhi:Neeraj Chopra is set to return to action in the Lausanne Diamond League as he faces a tough test in a challenging field. The event will take place on August 21 as Chopra prepares for the Asian Games later in September. Tough field at Lausanne awaits ChopraThe 28-year-old from Haryana will have to contend with a pretty strong field at the Lausanne Diamond League. After the Lausanne leg, Zurich will hold the next leg for javelin on August 27 before the final in Brussels on September 4/5. The Asian Games will take place in Aichi-Nagoya from September 19 to October 4.