"Liverpool's Chief Executive [Billy Hogan] contacted me directly," Bittencourt told ESPN Brasil in an exclusive interview. "I replied to him: 'My friend, I don't sell players now and I don't deliver them now. If you want to buy now, and only get the player in January, we can start talking... Or if you want to wait until December, we can talk in December."
Fluminense are reluctant to let Andre leave before the end of the season, with the team in contention for the Copa Libertadores.
The Rio de Janeiro-based club has reached the semifinals of South America's elite club competition and takes on fellow Brazilian outfit Internacional next month.
"There is an agreement between us, with the player and agent, that he would stay until the [Andre] end of the year," Bittencourt said. "They [player and agent] have complied fully and with the utmost peace of mind. Every interest that comes in, they communicate with Fluminense."
Under contract with Fluminense until December 2026, Andre is a key player for coach Fernando Diniz.
Andre has played a team-high 43 games this season and has attracted the attention of several clubs.
Fulham reportedly had a €20 million ($21.4m) offer for Andre rejected earlier this year.