The top three clubs in La Liga all play live on Sky this weekend - but how close is the title race?
Real Madrid smashed the Spanish record earlier this month after going 40 games unbeaten in all competitions and are currently top of La Liga.
With the exception of four back-to-back draws starting in late September, Zinedine Zidane's men have hogged the La Liga summit this season.
Sergio Ramos' own goal helped Sevilla overturn a one-goal deficit
But Real's unbeaten record ended with a 2-1 defeat to Sevilla this month , followed by a 2-1 loss at the hands of Celta Vigo in the Copa del Rey. As a result, Real are now only one point ahead of Sevilla in La Liga, but have one game in hand.
SEVILLA
Sevilla are this season's surprise title contenders, having only suffered three league defeats this term against Granada, Athletic Bilbao and Barcelona.
Jorge Sampaoli's side have won three successive Europa League trophies, having defeated Liverpool in the final last year, and are looking to be crowned league champions for the first time since 1945/46.
BARCELONA
Meanwhile, Barcelona are hunting their third successive league title, but are currently third in La Liga - one point behind Sevilla and two adrift of El Clasico rivals Real.
Having started the season in typical style, thrashing Real Betis 6-2, the Catalans dropped three points against Alaves in September before drawing 1-1 with Atletico Madrid later that month, followed by a surprise 2-1 defeat to Celta Vigo in October.
Barcelona's MSN strikeforce has once again been prolific in front of goal this season
In November, Luis Enrique's men lost 3-1 to Manchester City, managed by former boss Pep Guardiola, in the Champions League and have drawn four league games since.
ATLETICO MADRID
However, Spain's third powerhouse club Atletico have also been misfiring and currently sit fourth in the league - six points behind Barca.
Atletico kicked off their league campaign with back-to-back draws against Alaves and Leganes - a glimpse of what was to come.
Atletico Madrid's Antoine Griezmann (left) has been linked with a move to Manchester United
Having drawn 1-1 with Barcelona in September, Diego Simeone's men suffered defeats to Sevilla, Real Sociedad, Real Madrid, Villarreal and drew 0-0 with Espanyol before the festive break.
But how do the four La Liga contenders differ on the pitch? We have looked at the stats to compare each teams strengths and weaknesses...
ATTACK
The usual suspects top the goalscoring chart, with Barca's Lionel Messi and Luis Suarez, who turned 30 on Tuesday, netting 15 goals each, while Neymar has only scored five.
Real's FIFA The Best winner Cristiano Ronaldo leads the chart for Real with 12 goals, followed by Sergio Ramos (six) and Gareth Bale - who has scored five despite missing the last six games with an ankle injury.
Atletico's most prolific forward has been Antoine Griezmann, who has found the net eight times and has been linked with a move to Manchester United.
Wissam Ben Yedder has scored eight league goals for Sevilla this season
Sevilla's top scorer is summer signing Wissam Ben Yedder on eight goals, hitting a hat-trick against David Moyes' former club Real Sociedad earlier this month.
Barcelona have scored 51 league goals from 19 league games - more than Real (48), Sevilla (42) and Atletico (34).
Beside goals, the stats reveal Los Blancos domination across the front-line, leading their rivals for aerial threat with the most crosses and headed goals, as well as taking more shots, shots on target and winning more penalties.
DEFENCE
Atletico have struggled in front of goal but Diego Simeone's team have have once again proved their defensive resolve by conceding fewer goals and winning more duels, tackles, interceptions and aerials than the other three clubs.
Sevilla's lofty midseason league position has been boosted by 'keeper Sergio Rico, who has made more saves than his rival stoppers. The team from Andalusia have also been reprimanded by referees more than the other three clubs.
Barcelona have been the most error-prone of the leading pack, leaking four goals from mistakes at the back while Sevilla have only conceded one.
POSSESSION AND PASSING
Unsurprisingly, Barcelona have dominated possession again this season, averaging at 66.39 per cent, followed by Sevilla (60.12), Real Madrid (56.36) and Atletico (50.76).
Despite recording an average possession that rivals Barcelona, Sevilla are in fact the only club to have made more passes in their own half than in the opposition's half - which suggests a deeper style of possession football than the Catalans.
You can watch a host of live La Liga games on Sky this weekend. On Saturday, watch Eibar v Deportivo from 5.25 pm and Leganes v Celta Vigo from 7.40 on live on Sky Sports 1.
On Sunday, watch Real Betis v Barcelona from 10.55am live on Sky Sports 2 and Espanyol v Sevilla from 3.15pm, Athletic Bilbao v Sporting Gijon from 5.15pm and Real Madrid v Real Sociedad from 7.30pm live on Sky Sports 1.