Roy Krishna's first-half strike ensured their progress to the semifinals.
After taking the lead, coach Ivan Vukomanovic made some interesting tactical changes to make the team even better.
Ivan Vukomanovic's Kerala posted a 3-0 win to remain in the hunt for the semifinals.
Blasters lost to league leaders Hyderabad in their last outing to remain in fifth place with 27 points from 17 games.
Daniel Chima Chukwu scored again as Jamshedpur won 4-1.
The match ended 2-2 and dented their semifinal chances.
FC Goa crushed Chennaiyin 5-0 in the Indian Super League.
He scored in the 85th minute as Mumbai City ended their seven-game winless run.
Lalrinliana Hnamte scored in 90+1 to make it 2-2 after Chennaiyin had lead 2-0 inside 15 minutes.
The 0-3 loss crushed Chennaiyin FC's hopes of going atop the points table.