Arsenal and Tottenham Hotspur are reportedly keen to bring the former Chelsea winger back to the Premier League.
Paul Clement's Swansea City could face competition from Spanish giants Valencia, however.
Sunderland pair Vito Mannone and Fabio Borini are in the final 18 months of their deals.
Everton lost out to Arsenal in their Perez pursuit.
Leeds have an option to buy the Swedish defender for around £10 million less than that figure.
The Argentine hinted he could leave Goodison Park
Lazio's Morrison helped Queens Park Rangers to promotion during a loan spell in 2014.
The Magpies are reportedly happy to sell.
The Leeds United owner has returned home to continue the White's manager search.
Walter Mazzarri is the man the Hornets want to replace Quique Sanchez Flores, a report claims.