Rao, whose bowling action closely resembles Australian bowling great Glenn McGrath, impressed one and all in the training camp for probables in Lahore.
Dropping firm hints about Rao's inclusion, Pakistan chief selector Wasim Bari said: "He has performed outstandingly and we will definitely give him a chance very shortly".
Bari said Rao, who grabbed ten wickets in a recent local tournament, bowled extremely well. "He has a good out-swinger and smooth run up to the wicket," Bari was quoted as saying in the local media.
Rao is being flaunted as a secret weapon who could catch the Indians by surprise.
The Pakistan team, to be announced on Friday, for the first two One-dayers was also expected to include flamboyant all-rounder Shahid Afridi, who has been sidelined for over an year.
Afridi was included at the last minute in the probables list and is currently training in Lahore along with the other probables.
The selectors feel that Afridi's inclusion could also solve the problem of the sixth bowler as be bowls leg spin.
Middle-order batsman, Younis Khan who has been out of the team due to poor form and after his open brawl with Inzamam-ul Haq while training during last year's World Cup, was also tipped to be included.