Kenny Jackett will not be present at today's Pompey match against Oxford United.
The Blues' boss is absent from the sidelines following a family health issue.
As a consequence, assistant manager Joe Gallen has taken charge of first-team duties for the televised clash with the U's.
In a club statement, Pompey said: 'Portsmouth FC would like to pass on their best wishes to manager Kenny Jackett, who will not be at today’s game because of a family health issue.
'Assistant manager Joe Gallen will be taking charge of first team matters against Oxford.
'Our thoughts are with Kenny and his family.'