Tottenham were expected to beat the Slovenian Liga Prva champions to prolong their stay in some form of European competition this season after last campaign’s disappointing seventh-placed finish in the Premier League.
Proceedings started badly after Tomi Horvat gave the hosts an unexpected 1-0 lead in front of a 3,500 capacity-crowd.
And when Ryan Sessegnon got himself sent off late on in the first-half, Conte’s men realised they’d have to pull themselves out of a ditch in the second half.
Harry Kane’s effort 20 minutes from time gave reprieve, and a real belief that Tottenham would go on to claim a result.
Yet a last-gasp Amadej Marosa winner has left Tottenham needing to win against table-topping Rennes if they are to progress in the competition they were expected to win.
And Conte vented his frustrations at the performance his players gave.