Guardiola - who said 'records are there to be broken' - reckons Sunday's clash will serve as a barometer of what his side can achieve in the coming months as they hunt a quadruple.
Philippe Coutinho has put in his first training session since his British record £145million move from Liverpool to Barcelona. The Brazilian is now racing to shake off injury and make his official debut.
The Egyptian star bagged six goals in eight games in December to continue his stunning start to life at Liverpool since arriving from Roma last summer.
Real reached the quarter-finals of the Copa del Rey - where they will face Leganes - in midweek, but lie 16 points behind rivals Barcelona in the league.