Smith finished the five-match series with 774 runs and he was named as Player of the Series.
IPL chairman Brijesh Patel had last week confirmed that this year's league will be played around the September 19 to November 8 window and the same has been communicated to the franchises.
Yadav, who went through a prolonged lean patch in 2019, said both the batsmen have unique abilities.
India will tour Australia for three ODIs, four Tests and three T20Is between October this year and January, 2021.
The former Australian skipper also said he cannot wait for India's proposed tour later this year, which he expects to be an "awesome" series.
Smith and Kohli currently hold the top two positions respectively in ICC Test rankings and have been consistent across formats for a while now.
Cricket Australia last week confirmed that India will tour Down Under for a full tour comprising four Tests, three ODIs and three T20Is.
Last week, it was reported that Cricket Australia wrote to the International Cricket Council to postpone the T20 World Cup to 2021.
Top Australian players resume training, Steve Smith says in best shape after focus on fitness during break
Australia is one of the less-affected countries from the COVID-19 pandemic with little over 7000 cases reported so far.
Showering praise on Smith, Lee also said that the right-handed batsman could become as good as Don Bradman.
Steve Smith has been working out to keep his fitness level up as the Aussie cricketers gear up to return to training in some days.
In a three-minute long video out on his Instagram page, Smith talked about "two authentic swings that each player has".
Asked about Smith's attention to detail, Stokes said he can never be like that.
The right-handed batsman posted a video of himself on Instagram doing some cricket practice.
Andrew Flintoff says entire Australian team involved in ball-tampering scandal, Steve Smith just 'took the blame'
Smith was suspended for a year along with David Warner and Cameron Bancroft after being indicted in the sandpaper-gate during a Test match against South Africa in Cape Town.