Mulgrew made his return to Ronny Deila's side during the Scottish Cup victory over East Kilbride on Sunday.
Everton boss Martinez has come under increased criticism this season.
The striker joined Crystal Palace in the January transfer window.
Dominic Ball wants to stay at Tottenham once his Rangers loan spell ends.
Garth Crooks has hailed Newcastle new boy Jonjo Shelvey - but rued their inability to sign Saido Berahino.
Celtic won against East Kilbride in the fifth round of the Scottish Cup on Sunday afternoon.
Napoli fans expressed a show of solidarity with Kalidou Koulibaly on Sunday, wearing masks depicting the defender, after the Senegalese 24-year-old was racially abused by Lazio fans on Wednesday.
Leeds United boss wants players to leave so he can strengthen in the summer.
Federico Fazio was making his first appearance on loan for Sevilla since leaving parent club Tottenham in January.
Esteban Cambiasso would be the perfect signing for Leicester City in the summer.
Chelsea's new signing joined a select group of Spaniards to score on their first competitive outing in England – but it didn't work out for all of them, with former West Ham, Newcastle and Aston Villa players featuring.
The Yellow Submarine have made a habit of turning Premier League flops into fully-fledged top-flight footballers as these examples demonstrate
Tottenham are reportedly pursuing Saido Berahino and Victor Wanyama.