Kumar, along with several other accused, was produced before the Chief Metropolitan Magistrate through video-conference in the morning.
Kumar and others had allegedly assaulted Dhankar and his friend at the stadium on the intervening night of May 4 and 5 over an alleged property dispute. Sagar succumbed to the injuries later.
Meanwhile, the crime branch of Delhi Police took the Olympic gold medallist, Sushil Kumar, to Haridwar to investigate his hideouts and the people who helped him while he was absconding.
While sources said that Sushil Kumar repeatedly told the police that he did not intend to kill the victim, investigation has so far revealed that 13 people were involved
The police have arrested another associate of Olympian and wrestler Sushil Kumar in connection with the murder of 23-year-old junior wrestler Sagar Dhankar at Chhatrasal Stadium.
Eight persons including wrestler Sushil Kumar have been arrested in connection with 23-year-old Sagar Dhankar's murder at Chhatrasal Stadium.
Wrestler murder case: Delhi HC to hear tomorrow Sushil Kumar's mother plea seeking to restrain media
The petition is likely to be heard today by the Delhi High Court. The petitioner also sought to restrain the media from declaring him guilty even before the decision of the court.
Special Staff of Rohini District Delhi Police laid a trap near the Ghewra railway crossing and arrested the four persons after their identification through a secret informer.
Wrestler murder case: Sushil Kumar was nervous, changed statements during interrogation, say Delhi Police sources
Delhi Police on Monday said the Delhi Police Crime Branch will investigate the case related to the Chhatrasal Stadium brawl that led to the alleged murder of a 23-year-old wrestler Sagar.
After questioning Sushil Kumar for around 30 minutes inside the court, the police sought his custody for 12 days for further interrogation.
DCP PS Kushwah said that Kumar (38) and his associate Ajay, alias Sunil, (48) were arrested from Mundka.