Some of the names touted had plenty of credence, while others were perhaps a little more baseless in their substance.
And some of those player pursuits ended in the outcome desired, while others on the Blues radar finished the month elsewhere.
We’ve gone through all the names which emerged last month, and given you the inside track on how strong the interest was – and how things ended up.
5. Ryley Towler
The first sign of new sporting director Rich Hughes' work since arriving last September. Towler arrived for a six-figure fee from Bristol City and has made a big impression with his displays so far. Photo: Jez Tighe
6. Robbie Burton
The former Arsenal midfielder has been on trial at Pompey before and his name again surfaced. Nothing doing, though, and he remains on loan with Sligo Rovers from Dinamo Zagreb. Photo: David Price
7. Jake O'Brien
Irishman was mentioned late in the window. Is currently on loan in Belgium with Molenbeek from Crystal Palace, but Mousinho is known to value the young, hungry players coming from Ireland and the defender could well be an avenue to revisit. Photo: KRISTOF VAN ACCOM
8. Di’Shon Bernard
There was substance in the speculation as Bernard came in on loan from Manchester United on deadline day. Impressive debut followed against Barnsley with the Londoner playing right-back so far, although signed with the middle of defence in mind. Photo: Jason Brown