Nadeem accounted for both the openers -- Richard Levi and Devy Jacobs -- in successive overs to start the slide of Mumbai, who were all out for just 92, season's lowest total.
"My bowlers did a fantastic job. The wicket had something for them. I feel the openers wouldn't be effective against that kind of (spin) attack," Sehwag said after his side won the match by seven wickets.
Nadeem gave away just 16 runs in his four overs.
Mumbai never recovered after losing both the openers.
The host skipper Harbhajan Singh candidly said they were out of the game when they failed to put on even 100 runs on the board.
"I think 140-150 would have been competitive score on this wicket. There is a lot to learn from this game. Hopefully we will do better," he said.
Sehwag then said they would have chased differently had the target been 140. "You chase according to your target ..."