MADRID, Nov. 28 -- The 15th round of games in La Liga sees Real Madrid make a difficult trip to play Alaves, while Barcelona will see their away form seriously tested when they visit Atletico Madrid.

The round of matches kicks off on Friday night when Celta Vigo look to confirm the improvement they showed in their first two games under new coach Oscar Garcia at home to Real Valladolid.

Last weekend saw Celta win 3-1 away to Villarreal and this will be Oscar's first game in charge at the Balaidos stadium.

Real Madrid travel to Vitoria to take on an Alaves side that has only suffered one home defeat so far this season.

Zinedine Zidane's men produced some of their best football this campaign in their midweek 2-2 draw at home to Paris Saint-Germain, but will be without the injured Eden Hazard, and Zidane will have to consider whether to start Gareth Bale, Rodrygo or Isco in place of the Belgian winger.

A point in Vitoria would put Madrid top of the table and put the pressure on Barcelona ahead of their visit to Atletico Madrid on Sunday night.

Barca's away form has been poor this season as they showed in their struggles to beat Leganes last weekend, and Atletico will test their resolve to the limit.

Ernesto Valverde's men improved drastically in their 3-1 win at home to Borussia Dortmund on Wednesday as Lionel Messi, Luis Suarez and Antoine Griezmann all scored, and Sunday's game will be Griezmann's first against his former club since his move to Barca this summer.

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