Our young midfielder was loaned out to Second Division outfit Peterborough United last week and made his debut at Huddersfield on Boxing Day.
Now Posh, bossed by Barry Fry and former home of Simon Davies and Matthew Etherington, make the short trip to Cambridge United and the Cambridgeshire derby on Saturday.
Northern Irish Under-21 star Ciaran, still just 20, was just pleased to get that first league appearance under his belt.
He reflected: "I was hoping to play in the first game which was called off (last Saturday) but we went up to Huddersfield and it was a great experience to make my league debut.
"I found the game okay. It's certainly a new experience with fitness levels and concentration levels as well but I think I'm capable of coping with it.
"It's quite physical but you'd expect that compared to reserve team football. Players are playing for their living. It's a lot tougher, more physical and hopefully I'll get more of it, more experience and do well.
"I've always thought that you go from youth team to reserves, on loan somewhere and then back to Tottenham and try to progress there.
"Simon Davies and Matty Etherington were at Peterborough as everyone knows and the experience has paid off for them, Simon has done really well in the first team.
"Tony Gardner had that experience at Port Vale. He started well when he broke through and is now back after injury.
"It's an important time for me and hopefully I'll do well, come back after six weeks and then do well again for Tottenham."
Having been on the tails of the early pacesetters and as high as fifth at one point, Posh have slipped of late and are now hovering dangerously above the relegation zone.
So points over the festive period are vital - starting at the Abbey Stadium.
"It's busy time, a lot of games and that's good for me," added Ciaran. "The players have told me all about the next game, a big local derby against Cambridge. I'd like to do well in that one."
Ciaran Toner has just achieved the personal milestone of his league debut - now he's preparing for his loan club's biggest game of the season.