Monday's headline in French sports daily L'Equipe claimed he was 'Sans Rival' (without a rival) with one block of racing in the Alps left before Sunday's parade to the Champs Elysees.
Sagan beats Kristoff in a photo finish in Bern to win his third stage
Colombian Nairo Quintana (Movistar) – runner-up to Froome in 2013 and 2015 – has been promising attacks but has been toothless so far, while the other big names just do not seem strong enough.
Hayter wins men's omnium at World Track Championships
Frenchman Thibaut Pinot and Alberto Contador, who could have shaken Froome, both pulled out of the race, because of illness and injury respectively, leaving the Briton firmly in control.
But Froome has rubbished suggestions he has no rivals for the title, ahead of what he described as four "very tricky" days.
"I don't agree, I think other teams have said they're going to attack this week in the Alps and I expect they will do," he said after 'ticking off' Monday's 16th stage, a mostly flat ride from Moirans-en-Montagne.
"To say the Tour is won and I have no rival is rubbish," he added. "A lot can happen in four days, all you need is one bad day in the mountains and you can lose minutes."
After Tuesday's rest day, the Tour heads into the Alps with a mountain-top finish at Finhaut-Emosson, Swizterland, an uphill time trial on Thursday, another summit finish on Friday and a final mountain trek on Saturday.
"In this next block of four very tricky days, each day has its own challenges. The time trial is very important, each day is extremely challenging," said Froome.
The Briton leads Dutchman Bauke Mollema (Trek-Segafredo) by 1:47 and compatriot Adam Yates (Orica-Bike Exchange) by 2:45.
Quintana is fourth, 2:59 off the pace.
Netherlands secure women's Madison at World Track Championship, GB take bronze
Ronde van Drenthe
Watch finish of Ronde van Drenthe as Wiebes storms to victory