Leicester boss Brendan Rodgers hailed his players after their 4-1 rout of Leeds United at Elland Road.
Jamie Vardy was involved in the Foxes' first three goals - teeing up Harvey Barnes within two minutes for the opener after a costly mistake by Robin Koch.
Tielemans netted Leicester's second - pouncing on a rebound from Vardy's diving header - before Stuart Dallas' cross flew all the way into the net for Leeds after half-time.
But Leeds' response in the second half was stumped as Vardy netted a third for Leicester before Tielemans scored from the spot in stoppage time.
Rodgers later said: "I thought my players were brilliant. We had to be tactically disciplined and then play when we had the ball.
"If we get to March, April and we are in that position [second], then it will be nice, but there is a long way to go.
"We are missing some key players. Top-class international players but two 19-year-olds in the back line were superb tonight."
