A Collingwood fan has had his view of the tennis blocked by one of his icons.

Twitter user Daniel was in attendance at Rod Laver Arena on Friday night when Roger Federer and John Millman clashed in what was one of the greatest matches of tennis this Australian Open.

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Unfortunately, he might have missed a fair chunk of the action, given that Collingwood Magpies star Mason Cox was sitting in front of him.

Cox stands at a towering 2.11 metres.

Considering tickets inside Rod Laver Arena for the night session of the Australian Open can set you back more than $200, Daniel would have been forgiven if he were upset.

But he seemed not to mind too much, maybe since his Twitter handle indicates he’s a Magpies fan.

“Come on @masonsixtencox I paid good money for these seats did you have to sit in front me,” he joked on Twitter.

Cox replied to the fan shortly after with a simple: “Apologies mate.”

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Sure enough, Cox’s own Instagram account was full of photos of the court, describing the matches as an “epic night”.

Millman and six-time champion Federer went toe-to-toe on Rod Laver Arena for more than four hours on Friday night with the Swiss maestro finally nailing a 4-6 7-6 (7-2) 6-4 4-6 7-6 (10-8).

The Queensland veteran had the world No.3 on the ropes - up 8-4 in the first super tiebreak to be played on the Open’s main venue - but Federer reeled off six straight points to secure the victory.

- with AAP