The Algerian scored contributed to 26 Championship goals to help his side reach the play-off final this season.
Indeed, he was part of the Bees' famed front three that netted 58 times in the second tier.
Previous reports claimed Chelsea are keen on the 24-year-old but the Daily Mirror now says Leeds have entered the race.
Marcelo Bielsa's men went one step further than Brentford and secured promotion, and are now looking to strengthen in a bid to impress in the top flight.
What's more, the newspaper claims the Whites are "pushing hard" for his signature. They are even willing to pay up to £25 million for the winger.
However, a separate report from the paper claims Spurs have also registered interest. That report claims the north London side are keen knowing his price will likely drop to around £16 million.