Real Madrid have the chance to re-take the top spot in La Liga from Barcelona on Sunday when they travel to the Camp Nou to face the Catalan giants in El Clasico.
Having led La Liga for much of the season, some poor form in the last month from Los Blancos has seen Barca inch a point ahead of their old rivals.
Luis Enrique's side arguably enter Sunday's clash in better shape than Real but as ever in El Clasico, anything can happen.
Date: Sunday, March 22
Time: 8 p.m. GMT, 4 p.m. ET
Venue: Camp Nou, Barcelona
Real Madrid were unstoppable at the beginning of the season. From mid-September 2014 to the end of the year, they won 22 consecutive matches, including a 3-1 league win at the Bernabeu over Barcelona.
However, in 2015, they have looked increasingly vulnerable, losing five times in all competitions, including a humbling 4-0 thrashing by neighbours Atletico in early February.
They go into Sunday's mammoth clash on the back of a 2-0 home win over Levante last weekend, but in the three preceding matches they lost to Schalke and Athletic Bilbao, and drew with Villarreal.
While Real are struggling with poor form ahead of arguably their biggest match of the season, Barcelona are flying.
They have won three in a row in La Liga—and nine of their last 10—while their performance in beating Manchester City 1-0 on Wednesday was immense, with only Joe Hart's heroics preventing a mauling, per BBC Sport's Gary Lineker:
In this regard, Barca also seem to have the edge, particularly in the ongoing Messi-Ronaldo debate, with the Argentine clearly in better form, per Spanish football writer Dermot Corrigan:
Bale ended a nine-match goal drought with a double against Levante last weekend, a positive sign for boss Carlo Ancelotti ahead of El Clasico.
However, the relationship between the Welshman and Ronaldo is looking strained, per ESPN FC:
On form, Sunday's clash looks like Barca's to lose, especially given that it is at the Camp Nou.
But such huge matches are made for the best players, and the likes of Ronaldo and Bale will surely raise their game for El Clasico.
Indeed, B/R UK's Spanish football expert Guillem Balague is tipping Los Blancos for victory, outlining Real's best starting team below:
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It is not too big a leap to suggest the winner of Sunday's match will be crowned La Liga champions come the end of the season, such is the importance of the season's second Clasico.
Barca are the bookies' favourites and will dominate possession, with Messi, as ever, set to be the focal point for the Blaugrana's attacking threat.
Given their form and Real's current vulnerability, Barcelona should claim a vital victory on Sunday, and open up their La Liga lead to a potentially unassailable four points.
Predicted Scoreline: Barcelona 3-2 Real Madrid