Jitendra Singh Rathore of Rajasthan won the grueling 50 km event Sunday in the 6th Open National.
Saina Nehwal has won the Senior National Badminton Championship thrice while PV Sindhu has won the tournament twice.
Sachin will flag off all the races from Jawaharlal Nehru Stadium. It is known that marathon will be witnessing 20 percent more participants as compared to the ones who participated last year.
India's best ever medal haul at the competition stands at 11, which was fetched last year.
Saina Nehwal defeated former India number one Neha Pandit of Mumbai 21-10 21-10 while Parupalli Kashyap will take on Lakshya Sen in the semi-final.
The move was unexpected, to say the least as he was trying to find his feet in the world of single seater racing including F2 and F3, which are considered as feeder series to Formula 1.
Olympic bronze-medallist Saina, who had suffered a shin injury late last year, took the court after Sameer Verma conceded his men's singles tie following an Achilles heels problem during his match.