Davinson Sanchez said Tottenham's players have pledged to support "humble" Harry Kane irrespective of how the saga over his future plays out.
England captain Kane has been widely linked with a big-money switch to Premier League champions Manchester City.
City head coach Pep Guardiola has spoken of his desire to sign Kane, who had requested Spurs allow him to leave at the back end of last season.
Tottenham are reported to have turned down a £100million bid for the 28-year-old striker in June and are said to be preparing another offer before the transfer window closes.
Recent reports suggested City would be willing to bid as high as £150million for Kane, who has three years left on his Tottenham contract.
The saga has dragged on and Kane missed last Sunday's meeting between the two sides in their Premier League opener, which Spurs won 1-0.
Kane has been included in boss Nuno Espirito Santo's squad for their Europa Conference League qualifying double header against Portuguese outfit Pacos de Ferreira.
And defender Sanchez claimed Tottenham's squad will help Kane through a difficult period however they can.
"I'm his team-mate so I can't get deep on the situation," Sanchez told Football London.
"It's a situation that it's being discussed between Harry and the people above.
"We are just here to support him and if something happens then we are always going to be on his side.
"If he has the chance to be with us on the pitch then of course he's going to help us, there's no doubt about it.
"We are just on his side and any decision that happens or he makes then we are going to support him because he gives everything for the club."
Sanchez added: "Everybody here knows just how professional he is and no-one can have any doubts about how good he is as a player, how good he is as a person and his professionalism, as I say.
"Harry is the best number nine in the world. There's no doubt about it. If someone says differently they just do not understand about football.
"In my position, he helps me a lot as a player and as a captain he's been very humble and is a very good person.
"I could keep going, I will never stop about how good he is as a person."