Man City defender signs on-loan

The 27-year-old has struggled to hold down a regular first-team spot at Maine Road since his switch from Rangers two years ago and recently had a loan spell with Bolton Wanderers.

Ritchie will go straight into the Pompey squad for the top of the table clash with Norwich City at Carrow Road on Saturday.

Meanwhile, Pompey full-back Scott Hiley has joined his former club Exeter City on a month's loan.