Skipper Ajinkya Rahane concentrated hard as his unbeaten 86 off 197 balls took Mumbai to 237-4 against Rest of India on a weather-curtailed opening day of the Irani Cup.

The veteran of 5,000 plus runs in 85 Tests, who is not on national selectors’ radar, dug deep into his reservoirs of concentration to keep Mumbai on even keel against an impressive duo of Mukesh Kumar (3-60 in 14 overs) and Yash Dayal (1-46 in 15 overs).