Swiss coach Vladimir Petkovic said Friday that politics and football should "never mix" after two players celebrated goals in a 2-1 victory over Serbia with political gestures.
Next up for Serbia is Brazil, and while Tite's men have looked vulnerable in their opening group matches, they boast an embarrassment of attacking riches, who can turn over anyone on their day.
"We can't just play physically", he said.
Shaqiri clipped the post with a shot as Switzerland pushed on for a victor, but it was Serbia who felt hard done by shortly afterwards when Alexsandar Mitrovic was given the Harry Kane treatment, held down by both Fabian Schar and Stephan Lichtsteiner in the box only for the referee to wave away his claims for a penalty.
One sub-plot to watch out for could be the Serbian fans' treatment of Switzerland's three players with links to Kosovo.
Shaqiri was born in Kosovo, the former Serbian province that declared independence in 2008.
The Kosovo War that ended in 1999 remains a contentious territory in both Serbia and Albania with the region now residing within Serbia, but having it's own Fifa-recognised team.
Switzerland coach Vladimir Petkovic didn't want to discuss the issue Thursday.
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"We're in a situation where we need a win against Brazil on and we will focus and do whatever we can to try and win".
Switzerland will be full of confidence after holding World Cup heavyweight Brazil to a draw in Rostov-on-Don.
"I don't have any comments", Serbia coach Mladen Krstajic said.
Coincidentally, Xherdan Shaqiri went on to score a late victor for Switzerland, who move level on points with Brazil at the top of Group E, in the 2-1 triumph.
Xhaka silenced the Serbian contingent in the 52nd minute, however, when he rifled home a loose ball in spectacular style from 25 metres before Shaqiri ran onto a through ball and finished with aplomb to win the game at the death.
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.
Valon Behrami formed another luxurious axis in the heart of Switzerland's midfield, building on the sensational performance he put in against Brazil on Sunday, as he anchored the middle of the park judiciously, bringing composure and assurance to the midfield. Against Switzerland, he is likely to be the key player once again. Serbia striker Aleksandar Mitrovic asked recently. Bosnia finished third in its qualifying group and didn't make it to Russian Federation. I understand them. I think it's normal, it's part of their life.