Rajkot: Mumbai were in deep trouble at 8-2 after Punjab rode on Mayank Sidhana’s century and skipper Gurkeerat Singh’s 93 to notch up 468 in their Group ‘A’ Ranji Trophy tie here yesterday. Sidhana struck 254-ball 115, while Gurkeerat fell seven short of a century on Day Two at the Saurashtra Cricket Association Stadium.