Middlesbrough and Southampton could not be separated as a fascinating first leg of their Championship play-off somehow finished goalless.
After the build-up was spiced up by accusations of Saints spying on a Boro training session, the home side completely dominated the first half.
They had 17 shots to none from the visitors and came closest when Tommy Conway struck the inside of the post.
Saints improved after the break and could even have pinched victory late on when captain Taylor Harwood-Bellis thundered a header against the bar.
But with no goals scored, it is set up to be decided at St Mary's in the second leg on Tuesday (KO 20:00 BST).
Following Hull City's stalemate with Millwall on Friday, it is the second time in three seasons that both Championship play-off semi-finals have finished goalless in the first leg.
Championship play-offs rarely need any hype given the prize of Premier League football on offer for the winners.
But this tie was given added edge on Thursday when Middlesbrough accused Southampton of spying on a training session at their Rockliffe Park base, with the south-coast club subsequently charged by the EFL.
The dramatic episode added interest to what was already an intriguing match-up.
On the football side, when Middlesbrough hammered Southampton 4-0 at home in January, the gap between the sides was 13 points and 13 places.
Yet after 46 games, they were level on points, with Southampton one goal better off as they finished fourth and fifth respectively.
The Teessiders faltered badly in the run-in as they chased automatic promotion, while nobody matched Saints' tally of 47 points from the final 20 matches as they came flying up into a play-off spot.