The visitors took advantage of their only chance to score at Barnabeu. Real Madrid is dominating the match, they only need that right chance to balance the scoreline. Mallorca is playing a defensive game.
Having possession is good in a game, but the real dominance is creating scoring opportunities to become the lead team in the game. Real Madrid have been in good control of the game, but converting their opportunities into goals is all they need in this match.
Edit;
Madrid hasn't scored any goal. Mbappe goal was disallowed because he was in an offside position. Madrid is still struggling to find the back of the net for an equalizer after Mallorca took the lead with a beautiful header on the 18th minutes by Muriqi.
While typing this, I just refreshed through and realized they scored 2 goals in 2 minutes.... Whattttttttt!!!!!!??? This is impressive and has automatically pushed Mallorca into defending all through until the end of the first period! Okay, this is only beginning to get interesting, let's see how Mallorca reacts to this in the next half.