Alli left Spurs on a permanent deal in January last year before being loaned out to Turkish side Besiktas and eventually returning to Everton at the start of the summer.

Source: https://www.dailymail.co.uk/sport/football/article-12447743/Mauricio-Pochettino-reveals-Sir-Alex-Ferguson-wanted-Manchester-United-pay-100m-Dele-Alli-legendary-Red-Devils-boss-hailed-midfielders-meteoric-rise-Spurs.html?ns_mchannel=rss&ns_campaign=1490&it

Alli was just as ineffective as he failed to get a goal or assist in 13 matches and was subsequently loaned out to Besiktas.

Source: https://www.ibtimes.co.uk/dire-situation-everton-fc-under-farhad-moshiris-ownership-regime-1713651

As for the delay, all Boyd said there is a case ongoing between him and his old club Besiktas.

Source: https://www.dailybreeze.com/2023/02/21/tyler-boyd-over-the-moon-to-play-for-the-galaxy/

Dele Alli targeted in brutal parting shot by Besiktas president who states struggling Everton ace ‘won’t come back’

Source: https://www.thescottishsun.co.uk/sport/football/10802715/dele-alli-parting-shot-besiktas-president-everton/

Galatasaray currently sit six points clear of Fenerbahce and ten ahead of Besiktas in the Turkish Super Lig and the Istanbul giants will have a crack at the Champions League should they hold off their fierce rivals in the closing weeks of the title race.

Source: https://www.heraldscotland.com/sport/23463751.galatasaray-enter-kevin-nisbet-race-amid-championship-interest/?ref=rss

Meanwhile, Eric Bailly has exited for Besiktas while Donny van de Beek could also yet potentially leave, albeit the prospect grows slimmer with each passing day.

Source: https://www.manchestereveningnews.co.uk/sport/football/transfer-news/manchester-united-transfer-news-live-27683300

The 28-year-old from Calgary is now safe in Istanbul with Canada captain Atiba Hutchinson, who plays for Besiktas.

Source: https://www.cp24.com/sports/canadian-soccer-player-describes-the-horror-of-the-earthquake-in-turkey-1.6265559

The Dutch striker joined the club from for the second-half of last season after the Red Devils paid Besiktas to cut short his loan with the Turkish side.

Source: https://www.dailymail.co.uk/sport/football/article-12896197/Wout-Weghorst-blames-Erik-ten-Hags-tactics-struggles-loan-Man-United-season-striker-scored-just-two-goals-time-Old-Trafford.html?ns_mchannel=rss&ns_campaign=1490&ito=1490

The Holland international then reportedly told his parent club that he didn't want to play in the Championship and secured a loan move to Turkish side Besiktas before making the switch to United midway through the current season.

Source: https://www.dailymail.co.uk/sport/football/article-12082037/Vincent-Kompany-hold-talks-Man-United-loan-flop-Wout-Weghorst-end-season.html?ns_mchannel=rss&ns_campaign=1490&ito=1490

The result took Trabzonspor up to fourth in the Turkish Super Lig just ahead of Besiktas on goal difference.

Source: https://www.dailyecho.co.uk/sport/23919639.southampton-loan-watch-paul-onuachu-continues-fine-form-turkey/?ref=rss

The Turkish midfielder became a firm crowd favourite at the MKM Stadium last season and came close to a move to Besiktas in January, before opting to remain in East Yorkshire.

Source: https://www.hulldailymail.co.uk/sport/football/transfer-news/ozan-tufan-hull-city-transfer-8597159

Where Alli is concerned, it has become a familiar tale and Besiktas, it can be revealed, had been warned.

Source: https://www.dailymail.co.uk/sport/football/article-11974009/IAN-LADYMAN-Dele-Allis-sad-tale-one-failure-field-grotesque-excess-it.html?ns_mchannel=rss&ns_campaign=1490&ito=1490