Bucs pushed forward with Relebohile Mofokeng and Tshepang Moremi creating opportunities, but both squandered clear chances. Before the break, substitute Abdoulaye Mariko forced a fine save from Xuli with a stinging effort from range.

The second half followed a similar script, with Pirates probing but unable to find the finishing touch. Kamogelo Sebelebele came closest in the 76th minute, only for his shot to be blocked by Siwelele's resolute defence.

Just as extra-time loomed, Mbokazi took matters into his own hands. Collecting the ball in midfield, the skipper unleashed a powerful strike from distance in the 87th minute, sealing Pirates' progression and underlining their growing reputation as South Africa's modern-day cup specialists.

For Siwelele, the defeat was a bitter pill after such a committed display, but they leave the tournament with pride intact. Pirates, meanwhile, march on, confident their cup pedigree can carry them deeper into the competition.

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The result stretched Spurs' strong record against Leeds to six victories in their last seven meetings and provisionally lifted them into second place in the table.

Leeds started brightly in difficult conditions as Sean Longstaff's free-kick, carried by the swirling wind, almost embarrassed Guglielmo Vicario, only for Joe Rodon's header to clip the post.

Tottenham struck first, however, when Mathys Tel, handed a surprise start, justified his selection with a driving run and a deflected effort off Pascal Struijk that wrong-footed Karl Darlow.

The hosts responded and levelled before half-time when Brenden Aaronson's strike forced Vicario into a fumble, allowing Noah Okafor to tap into an empty net.

Spurs nearly retook the lead just before the break as Tel's header struck the crossbar, while Vicario produced a vital stop from Dominic Calvert-Lewin early in the second half.

The decisive moment came shortly before the hour mark. Kudus punished hesitant Leeds defending with a powerful drive from the ed

Mbekezile Mbokazi's thunderbolt sends Orlando Pirates into Carling Knockout quarter-finals