Kane has not played since being stretchered off against Sunderland on September 18 - and Spurs have scored just six goals in as manymatches in the league and Champions League since - while Alderweireld has missed three matches with nerve damage to his knee.
"Everyone wanted to see how Spurs would bounce back after the end of last season and I think they've shown they are a team that have to be taken seriously as title contenders", King told Reuters.
They certainly responded well to Janssen's strike, as Ahmed Musa equalised two minutes into the second half, finishing from Jamie Vardy's brilliant assist. "We need to be more determined to score... to take the ball, to be more direct, to believe".
They haven't won in the league since what was supposedly a statement victory over Manchester City at the start of October and, although they are still unbeaten, still just don't win enough in general. I'm very pleased. We started well; we tried to win, they tried to win, a very good match, this is the magic of Premier League football'.
"We've worked very well this week", Leicester manager Ranieri said.
Leicester had lost all four of their previous away games this season - for a goal difference of -10 - but they battled well and frustrated a Tottenham side lacking a cutting edge in attack.
Spurs have now drawn three on the bounce in the league, scoring just twice in those fixtures.
"So far [this season] we haven't seen everybody showing that spirit together, but today I saw everyone showing it".
'It is hard to know when they will be back but we will see.
Ranieri also suggested that Tottenham striker Janssen had gone down too easily under Robert Huth's challenge to win the home side's penalty. It doesn't matter. I said to the players don't use it as an excuse.
Tottenham striker Vincent Janssen was delighted with his goal for the draw with Leicester City.
"We've now got a massive game against Leicester which will mean a lot to everyone for different reasons so everyone is now fully focused on that", England worldwide Dier said.
Ranieri remains hopeful that Islam Slimani, who did not feature against Spurs, will recover from his groin injury in time for the midweek Champions League trip to Copenhagen.
"The player that has impressed me the most this season is Victor Wanyama".