Boxers across a number of categories got their pursuit of a Rio 2016 place underway today ©AIBA

Commonwealth Games silver medallist Mandeep Jangra of India's dream of competing at Rio 2016 is over after he suffered a shock first round loss at the hands of Spaniard Youba Sissokho Ndiaye at the International Boxing Association (AIBA) Open Boxing World Olympic Qualification tournament in Baku.

Welterweight Jangra, who also won Asian Championships silver in Amman in 2013, struggled in his bout with Ndiaye and the Spanish boxer prevailed by virtue of a split 2-1 decision at the Sarhadchi Olympic Sport Complex.

Ndiaye will face Juan Ramon Santos of the Dominican Republic in the next round.

Germany's Abass Baraou produced one of the performances of the opening day of the event in the Azerbaijani capital as he knocked out New Zealand's Joshua Nyika in the second round of their welterweight clash.

While Nyika's chances of representing his country at this year's Games have faded away, his brother David Nyika still remains hopeful of heading to Rio as he will fight Togo's Kevin Prudence L. K. Kuadjovi in the heavyweight division on Saturday (June 18).

Paul Kroll of the United States was another welterweight boxer who progressed today as he overcame Dimitrious Poulikos Tsagkrakos of Greece.

The first day of the event in Baku proved to be a fascinating one
The first day of the event in Baku proved to be a fascinating one ©AIBA

The American boxer was able to control proceedings from start to finish, which was reflected on the scorecards as all three judges awarded him the win.

World Military Games silver medallist Dheeraj Rangi managed to succeed where his Indian team-mate had failed as he breezed into the second round with a unanimous victory in his lightweight bout against Kevin Alfonso Luna Manoz of Guatemala.

Rangi's path to potential qualification for the Rio 2016 Olympic Games is far from straightforward as his next opponent will be top seed Lindolfo Delgao Garza of Mexico.

A total of 39 Olympic places are on offer during the tournament in Baku, which runs until June 25.

The top five boxers at flyweight, bantamweight, lightweight, light welterweight, welterweight, middleweight and light heavyweight will all earn Olympic berths.

In addition two spots are available at light heavyweight, with only the winners in Baku progressing at heavyweight and super heavyweight.