Spark Sport’s Rugby World Cup streaming got off to a sound start on the tournament’s opening night with 60,000 viewers watching Japan beat Russia.

It then ran into problems during the high profile All Blacks - Springboks match with some viewers facing pixellation, blurring and, in some cases, losing the stream altogether.

On the night Spark Sport reached for its back-up plan and shifted live coverage to TVNZ for the remainder of the game.

Spark Sport says the issues only affected a “small number” of customers. This seems to be underlined by the viewer numbers, during the match the peak number of streams was 132,000. This dropped by only 6000 to 126,000 after TVNZ coverage kicked in.

The problem was identified as an issue getting the video streams back from the US to New Zealand. This was fixed with upstream configuration changes. Spark Sport boss Jeff Latch told media he was confident streaming will work perfectly for the remainder of the tournament.

The rest of the first week of coverage passed without incident. New Zealand’s domestic broadband networks appeared to perform flawlessly during the busiest week yet. Chorus says traffic on its network peaked at 2.3 terabits per second during the All Blacks game.