Vicente Guaita (£4.5m) can be a big-value signing for Fantasy Premier League managers next season.
Guaita made 86 saves last season and claimed 12 clean sheets in LaLiga.
His new team-mate Hennessey produced 91 saves and returned seven clean sheets.
And Guaita saved 76.6 per cent of the shots he faced, compared with Hennessey's 68.2.
Guiata v Hennessey in 2017/18
Significantly, Guaita boasts an impressive penalty-saving record.
He stopped two of the three spot-kicks he faced last season. Only Lukasz Fabianski (£4.5m), with three, bettered that among FPL goalkeepers.
Over the last four seasons, Guaita has saved five penalties in LaLiga.
This can provide a significant boost to his points potential in Fantasy.
Goalkeepers earn five points for every penalty save.
They also pick up 12 points in the Bonus Points System, which determines how the bonus points are awarded in each match.
Palace were revived upon the arrival of manager Roy Hodgson from Gameweek 5.
They produced nine clean sheets from that point, a total bettered only by teams finishing in the top seven places.
Patrick van Aanholt (£5.5m) was the big draw in their defence by the end of the season, with three goals in the final three Gameweeks.
But Guaita is cheaper and has the potential to become one of the top value picks in Fantasy for 2018/19.