01 Noviembre, 2017
But Tottenham have stepped up their monitoring of the player, with the London club watching Tierney during last month's Champions League defeat against Bayern Munich in Germany before dispatching chief scout Steve Hitchen to watch him in action in the return fixture at Celtic Park on Tuesday.
Brendan Rodgers insisted that Celtic could take huge confidence from running Bayern Munich close last night, although he admitted that careless defending had cost them the chance to survive in the Champions League.
He signed a new six-year contract recently and is a boyhood Celtic supporter so it would be a challenging deal to complete.
Forrest, 26, was a thorn in Bayern's side for the entire 90 minutes and his performance has drawn praise from pundits and players alike, including McGregor.
His point was proven at Celtic where teenager Manuel Wintzheimer was hastily promoted from the Under-19s as the only striker in the senior squad.
For all his tooth-whitened optimism, however, Rodgers knows anything other than a defeat will be a shock.
On the half-hour mark Dembele and Armstrong worked a neat move, but the former had the ball nicked off his toe by David Alaba as he prepared to score at the back post.
Yet it was enough to lift the crowd, with Bayern not really threatening Craig Gordon.
It wasn't the prettiest assist you'll ever see, but then again Ulreich is paid to keep the ball out of the net rather than help put it in. If the 20-year-old harbours hopes of making it at the top level, however, these are the nights in which he must perform.
To be fair to Ronaldo, he has got five Champions League goals to his name already, so it's pretty much impossible to assist yourself.
Callum McGregor equalised for Celtic in the second half, only for a bloodied Martinez to restore Bayern's lead 13 minutes from time.
While Antonio Valencia is comfortably first choice on the right of Manchester United's rearguard, the left-back slot is not nailed down by anybody.
Tierney went on to add that his team-mates have also played a vital role in his development.
Rodgers is expected to demand around £50m for the Parkhead pair.