Simunovic has been in excellent form for Celtic this season.
Simunovic has enjoyed a turbulent time at Parkhead since his arrival in 2015, performing well when fit but spending large parts of his first campaign on the sidelines due to injury.
Celtic's Jozo Simunovic in action with Rangers' Barrie McKay
And it appeared that he was going to spend just one season with the Bhoys as he was seemingly closing in on a move to Serie A side Torino during the latter stages of the summer transfer window (via Daily Mail).
But with that move falling through, and with the 22-year-old now enjoying a run in the side, he has been able to prove, once again, just how important a player he can become for the Hoops. And Toure has explained how highly he rates his positional rival.
"Jozo's a good boy and still only 22 years old. I've been very impressed by his quality," he said, as reported by the Record.
"He was injured for a long time but he's training so well now every day.
"When you're not playing in the team yourself, you see things. I've been more than happy because he's doing his job for Celtic."
The partnership between Simunovic and Erik Sviatchenko has been a crucial reason for Celtic's success this season. In the 12 games that the Croatian has played, the Hoops have kept seven clean sheets.
And with the pair both in their early-to-mid twenties, it seems highly possible that they can both remain stalwarts of the side for years to come.