David Strelec showed Celtic what they're missing as the Slovakian hitman netted a screamer to stun Germany.
The ex-Slovan Bratislava goal machine was on the Hoops' radar in January and across the summer.
It's believed the Scottish champions had a big-money bid thrown out for the 24-year-old in January.
His dad claimed last month that Celts had revived their interest and were weighing up another offer.
But Strelec ended up in the EFL Championship after Middlesbrough agreed a deadline-busting £6.5million deal.
The marquee switch was hailed as a major coup for Boro - and the relatively modest fee already looks like a steal.
That's because Strelec stole the show with a stunning goal to help fire the Slovaks to a famous 2-0 win over Germany.
Strelec was involved in bot