Cardiff City travel to Upton Park to play their first match against West Ham in the Premier League.
Malky Mackay's men made the move from the Championship to the Premier League last season. They became the the second Welsh side in the English top flight joining rivals Swansea City.
The match kicks off at 15:00 BST today.
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A chilly start to the day is expected but prolonged spells of sunshine will allow the temperatures to respond, highs of between 14 - 17 °C