New Delhi, Oct. 18 -- As the newly refurbished Jawaharlal Nehru Stadium gets ready to host high-profile musical concerts, the athletes and coaches of Delhi have written to the Sports Authority of India (SAI) asking when they can get access to at least the warm-up area and throwing zone, as "complete closure of the training facility is adversely affecting their progress." This weekend, the JLN Stadium will host famous composer and rapper Travis Scott (Oct 18-19) for his Circus Maximus Tour-Delhi. A grand stage is being set up inside the main arena which was recently renovated and saw a new Mondo track laid. On November 9, Akon is also scheduled to perform at the JLN Stadium, for which tickets are on sale. The 500 athletes, who train at the JLN Stadium, have been going to different venues to practice over the last six months as the stadium went through renovation for the World Para Athletics Championships. Mondo tracks have been installed in the main and the warm-up areas at an estimated cost of Rs.23 crore. Athletes were hoping to resume training at the stadium after the Para Worlds Athletics Championships concluded on October 5, but that has not happened. Peeved athletes and coaches have jointly written to SAI on the issue. "JLN Stadium is a key venue under schemes (Come and Play, Khelo India, Fit India) where many national-level and aspiring athletes, including several under the SAI banner, have been rigorously training. However, since the conclusion of the recent championship (world para), the stadium remains closed to athletes for training purposes," they wrote. They said when they went to the joint administrator of the venue, they were informed that a new SOP (Standard Operating Procedure) is expected to be introduced in the coming one or two months. "While we understand and appreciate the need for structured and safe operations, the complete closure of training facilities - especially the warm-up area and throwing zones - is adversely affecting the progress of athletes preparing for national and international events," they said in the letter....