Euro 2020 tussle with England on Friday. International football's oldest fixture didn't deliver the goals but nonetheless proved a gripping spectacle.And watching on from the stand were a pair of interested Celtic observers.Ange Postecoglou marked his emergence from self-isolation by rocking up to Wembley alongside Dominic McKay as the pair plotted their vision of the future at Parkhead.
Here's 5 potential takeaways from their visit to London.CalMac on top form Callum McGregor served a timely reminder of his quality with a hugely assured and controlled display in Scotland's midfield.
Billy Gilmour's exciting breakthrough performance understandably snatched the bulk of the plaudits but he was partnered by a player who can clearly still.
Read more on dailyrecord.co.uk