Postecoglou moves a step closer to making good on his reputation for securing silverware in his second season at clubs and delivering a first cup for Spurs since they won the League Cup in 2008.
Daley Blind's late second half strike helped a lacklustre Manchester United salvage a 2-2 draw against West Bromwich Albion at The Hawthorns in the Premier League on Monday.
Manchester City chalked up yet another victory to maintain their stranglehold of the Premier League title race but pursuers Manchester United and Leicester City both secured important wins to enhance their top-four bids on Sunday.
Images from the Champions League matches played across Europe on Wednesday.
Imperious Liverpool extended their Premier League home winning streak against Arsenal to six on Saturday with an easy 4-0 victory that lifted them to second in the table.
Manchester City overcame a spirited Bournemouth side 3-1 on Saturday to maintain their unbeaten streak and extend their lead at the top of the English Premier League to five points.
Manchester United stayed in fifth place, one point above West Ham, but it was another depressingly dull day at Old Trafford where United were booed off after losing 1-0 to Southampton.