Monday Transfer Gossip (July 4): Sheffield Wednesday eye Nelson Oliveira | Huddersfield tracking Chelsea youngster | Curtis Main set to exit Doncaster

The Owls, who have signed young Tottenham midfielder Charlie Hayford, 19, on a one-year deal, are now making concerted moves in the transfer market, having signed Sunderland striker Steven Fletcher and reportedly tabling an £11.5m bid for Fulham’s ex-Leeds United marksman Ross McCormack, which was rejected by the Cottagers.

Oliveira, 24, has previously been on loan at Swansea City and later netted nine goals in a loan spell at Nottingham Forest last term, before a groin injury ended his hopes of earning a spot in Portugal’s Euro 2016 squad.

The Owls have also been linked with Sporting Lisbon’s Scottish midfielder Ryan Gauld and Monaco striker Ivan Cavaleiro.

Tottenham midfielder Ryam Mason remains high on Hull City’s wanted list, with the Tigers tipped to make a £10m bid.

Mason, who spent a loan spell earlier in his career at Doncaster Rovers, has dropped further down the pecking order at White Hart Lane following the signing of Victor Wanyama and could now link up again with ex-Spurs colleagues Tom Huddlestone and Jake Livermore.

Huddersfield Town is eyeing a move for Chelsea starlet Kasey Palmer - who impressed for the Blues’ youth team and made the first-team bench last season.

The teenager was called up by England under-21 boss Gareth Southgate for the Toulon Tournament squad as a late replacement for Leicester winger Demarai Gray and is rated highly by the Londoners.

Hearts defender Jordan McGhee is set to join Middlesbrough on a season-long loan today.

The 19-year-old is expected to travel to Teesside to complete the move on the club’s first day of pre-season training.

Meanwhile, Boro have told Newcastle United that they are not willing to sell key defender Daniel Ayala, wanted by the Magpies, whose manager Rafael Benitez worked with the Spaniard at Liverpool.

Ayala, rated at around £15m, had an outstanding campaign for Boro last term, with several top-flight sides also monitoring developments.

Sheffield United have tabled bids for several players, including MK Dons defender Kyle McFadzean, who started his career at Bramall Lane.

McFadzean is keen on a return north.

Doncaster Rovers striker Curtis Main is close to joining Portsmouth.

Main has a year left on his agreement at the Keepmoat Stadium, but has been told he isn’t wanted by Darren Ferguson.

The 24-year-old made 14 appearances at Donny last term, before he was sent out on loan to Oldham, contributing to Oldham’s survival at the expense of relegated Rovers.