[1] Grau's debut on 18 November was a 3–0 home win over Lleida with all the goals scored in a six-minute spell.
Unlike many managers working abroad, Grau took his wife and infant daughter to Cyprus, citing the island's low crime rate and presence of the English language.
[4] In November 2021, Grau signed for Inter Turku of the Finnish Veikkausliiga, succeeding compatriot José Riveiro on a two-year contract with the option of a third.
[6] Grau said that Finnish footballers were "methodical" and "mechanical" and needed the creativity of foreign players, which became more complicated due to points deductions for not fielding enough nationals in a team.
He said that several players left in June at the halfway point in the season, and when they were preparing for a UEFA Conference League qualifier.