Ivanovic, Serbia's most experienced player, charged at the ball just before Xhaka blasted it into the back of the net and was in great position to make a block - but he dove to the ground at the last second.
Here's how to watch Serbia vs. Switzerland online.
Swiss coach Vladimir Petkovic has vowed to keep up his side's high-tempo, physical approach that earned them a draw with Brazil. "We need him in the next couple of matches", Petkovic said.
It is not a mistake current coach Mladen Krstajic intends to repeat and the Lazio man - who has reportedly attracted the interest of Real Madrid - was lively against Costa Rica. "I did it, and we don't have to speak about this". After nearly putting his side ahead with a curling strike that clipped the woodwork, the Swiss livewire scored the goal his performance deserved in the final minute of normal time. Serbia striker Aleksandar Mitrovic asked recently.
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"I guarantee you my players will take responsibility, be aggressive and on top of the other team", Krstajic said Thursday. "It's going to be a fierce match tomorrow".
Meanwhile, Shaqiri was born in Kosovo when it was part of the former Yugoslavia and emigrated to Switzerland with his family.
Stoke midfielder Xherdan Shaqiri is expected to continue to wear footwear which will have the Kosovo flag on his right heel to pay tribute to his heritage.
In truth, Switzerland were poor in the first half, and Serbia should have capitalised on the momentum they built in the first 45 minutes, but having failed to score a second, the Swiss came out after the restart a completely different entity, and the Serbs, as a result have left their World Cup campaign in major jeopardy.
Neither coach would be drawn on the issue Thursday, with Krstajic saying he is "not interested in politics".