Thomas Frank believes Tottenham's owners are "120 per cent committed" after rejecting a third takeover approach for the club in as many weeks.
The Lewis family own Spurs through the investment company ENIC and on Friday the club announced to the London Stock Exchange that they had "unequivocally rejected" an informal expression of interest in a takeover from a consortium headed up by tech entrepreneur Brooklyn Earick.
The takeover would have reportedly involved a £3.3billion bid from a 12-strong group including NFL and NBA investors, with a further £1.2billion set aside as transfer funds for head coach Frank.
A source close to the Lewis family told football.london : "This unsolicited and unnecessary interest does nothing to change the family's resolve and commitment to do whatever it takes to drive success on the pitch. The club is not for sale."
It is the third such approach that Spurs have rejected since Daniel Levy left his role as chairman earlier this month, with an Asian consortium of investors as well as Newcastle director Amanda Staveley with PCP International Finance both turned away.
Earick's consortium now has until October 24 to either announce a firm intention to make an offer for Spurs or announce that it does not intend to do so.
Siblings Vivienne and Charles Lewis have become the public face of the Spurs ownership and could be seen in the directors' box at the recent home games against Villarreal and Doncaster Rovers.
Ahead of Spurs' latest home Premier League clash against Wolves and amid the backdrop of a third rejected takeover approach, Frank said that from his conversations with the Lewis family he is certain they are in it for the long haul.
"Very, very, very invested. 120% committed to the club. They really want to achieve something special," he said. "They want to build, want to add, and I like the phrase, building layers, because you never go straight to the top. You can't jump five steps. That's impossible.
"So building layers is very important. I think that's also more organic and more sustainable over time. But they're very, very focused on what they can do to help the club."
Frank believes it is important that the Lewis family have become more visible owners since the changes at the top at Tottenham, especially following a long period where there was a disconnect between the fanbase and ENIC.
"If you're an owner or a leader, it's important to be visible so people can see you," the Tottenham head coach said. "So I think it's positive."
Spurs go into Saturday's clash with Wolves with question marks still lingering over striker Dominic Solanke's ankle. The England international has been struggling with the injury since the summer and is continuing to feel discomfort in it.
That has meant the 28-year-old started the week training with his team-mates but has had to stop due to the pain.
Frank revealed that the problem lies within the ankle but is not a ligament issue.
"I think sometimes, let's say you've got a calf sprain or hamstring or even ACL, it's very simple, very easy to deal with," he said. "Sometimes it's just a little bit more tricky. So this is a little bit more tricky without being a problem. I expect Dom back as soon as possible."
Frank and the club have been looking to improve the communication with the medical and performance departments after last season's problems which resulted in Ange Postecoglou having more than 10 players out for a number of games and some players getting reinjured immediately after returning.
"That was one of the big areas we looked into when we came in. I see it as a holistic picture," he said. "It's between the coaching, performance and medical departments. It can't be three departments not communicating with each other, it has to be three constantly communicating back and forth. It’s how we train, how well we train and how well we plan that.
"All that so far has been good. Touch wood we haven’t had any soft tissue or muscle injuries which are the big ones we’d like to avoid. We’ve had an injury to Kolo Muani which is a dead leg contact injury, then we have Dom miskicking a ball. So we have two relatively unlucky ones. So can we nail and get on top of the muscle injuries? Probably impossible to not have any of those injuries but so far so good and we're very aware of it."
He added: "I think it's about workload in training, it’s not too little, definitely enough intensity because we train and play with intensity, then I think it’s all about the planning – gym, recovery, lots of things.
"1000 per cent [it's crucial to prevent another list of injuries]. If we have plus 90 per cent availability, it’s so important."
One player who is currently fit is summer signing Xavi Simons, who has already left a good impression on the Tottenham fans. Frank has previous form with developing playmakers, particularly former Spurs star Christian Eriksen. The two Danes worked together when the midfielder was a youngster and later at Brentford.
Frank was asked what similarities he could seen between the 22-year-old Xavi and the 33-year-old former Tottenham star, who is now at Wolfsburg in Germany after a spell at Manchester United.
"He’s got a few things, I would say. I like his composure in possession. So every single time [Xavi] receives the ball, it seems like he got half a second more before he passed it or took players on," said the Tottenham head coach. "So I like that a lot. I think the way he also can see passes not many others are seeing, I think is important. And also the way he carries the ball forward, I think is a key thing.
"So those are the big things, and then of course he will arrive and score goals and all that, but I think those three things are key areas.
"I think they're a little bit different. They're both playmakers, different type of playmakers. I had Christian when he was 17 up to now, but I think he was in a way a little bit of a deeper playmaker, and I think Eriksen's longer play was exceptional.
"I think when he was here outside the box, when he found Dele Alli in the box, those crosses, I think the balls in behind, I think it was exceptional. I think his finishing outside the box was exceptional for Eriksen. But Xavi is maybe a little bit more in between the lines, more of a one-on-one player than Eriksen, but both of them very good players."
The Spurs boss believes Tottenham's new Netherlands international will adapt rapidly to the demands of the Premier League.
"I think it will be relatively quick, but it's always a little bit difficult to guess. I like what I've seen so far from him. I like the Brighton half an hour because he was arriving in some of the areas we wanted to, having two good chances. Could have set Richy up, if Lucas was not taking the pass away from him," he said.
"As I said, the West Ham game I think was promising. There were also good moments against Doncaster where he was driving the ball forward, setting up Wilson, setting up a few situations. I think more and more, you're playing with new team-mates, that relationship is important. You need to understand when he's coming, is he actually? I'm playing into feet but then he's actually going away. So that bit is important."
He added: "I think the biggest adjustment is probably the intensity in the Premier League. That's difficult to work with in training. Of course we try to train with intensity but because we play quite a few games, there's not many where we can have that. But when we can, we try to get intensity in. I think for me it's just for him to not adapt, but get used to more and more of that intensity."