Gets mentioned here as a big part of Cagliari's recent success https://statsbomb.com/2019/11/can-cagliari-turn-a-hot-start-into-a-historic-season/
In addition to their battering ram, Cagliari also lost Alessio Cragno to injury, the goalkeeper who in their last edition of Serie A saved the most goals, compared to the average keeper (9.93 goals saved above average). In his place came Robin Olsen, ill-treated goalkeeper of AS Roma, currently a key performer in the success of Maran's team.
Cagliari are indeed overperforming, having conceded just 9 non-penalty goals from 13.18 xG, a feat accomplished largely thanks to their Swedish keeper. Olsen has saved 85% of the shots he has faced, 14% more shots than the average keeper (the associated expected save percentage is just 71%). He also has the highest GSAA,, 6.68, in Serie A. In other words, he's preventing 0.56 goals more than the average keeper every game he plays, but he wonít necessarily keep this form for the entire season.
In regards to claiming crosses etc....stats profiles of him show that he is one of the least aggressive claimers of the ball in europes 5 big leagues. 9/10 he chooses to stay on his line than come out and claim a cross :https://twitter.com/StatsBomb/status/1076062184528998400?s=19https://twitter.com/StatsBomb/status/1088168842742980623?s=19