Kick-off in the capital was delayed due to a sanitation issue inside the stadium, and while the water may not have been flowing, the goals certainly were in a breathless first half.
James Maddison had directly contributed to seven goals in eight previous meetings with Brentford, and he added to that tally inside 11 minutes as his free-kick from the left was thundered home by Cristian Romero.
The Argentinian was subsequently forced off with a head injury, and Spurs’ defence suffered as a result as the match was flipped on its head.
First, after a lengthy VAR review, referee Robert Jones awarded the Bees a penalty for a trip from Son Heung-min on Mathias Jensen. Bryan Mbeumo, who netted twice in the most recent head-to-head between these sides, stepped up and coolly converted from 12 yards.
Less than 10 minutes later, the visitors’ frustration had reached boiling point as they fell behind. Rico Henry burst into space on the left, and his cutback picked out Yoane Wissa to slot home, via a cruel deflection off Micky van de Ven’s leg.
Postecoglou’s side were down but not out, and they took full advantage of the 11 minutes of stoppage time to level before the break. A loose ball on the edge of the area dropped to Emerson Royal, and the Brazilian’s powerful effort proved too good for Mark Flekken in the Brentford goal.
Son’s first game as Spurs captain was going from bad to worse on the hour mark, as he spurned a glorious chance to put his side back ahead, with his effort at the back post well stopped by Flekken. Richarlison also forced the Dutchman into action, but the second half failed to match the first for entertainment value as energy levels dipped.
For the third time in four meetings, both sides went home with a point apiece as Brentford continued their record of never losing on the opening day of the PL season.
There was plenty of promise for Postecoglou in his first match in a PL dugout, and the Australian will be looking to avoid a similar fate to that of his predecessors - Spurs have ended each of the last four seasons with a different manager than they started it with.
Flashscore Man of the Match: Rico Henry (Brentford)