Dele Alli booed off the pitch by Besiktas fans after being replaced in 28th minute, it's sad to see

Dele Alli was booed by his own supporters after Besiktas manager Senol Gunes hauled him off just 28 minutes into their Turkish Cup clash against third tier Sanliurfaspor.

The 26-year-old midfielder, who was once labelled one of the Premier League's hottest prospects, has struggled of late.

He joined Everton at the start of the year on a free transfer but after starting just one game for the Toffees, Alli was shipped to Super Lig outfit Besiktas, who decided to take a chance on the former Spurs man.

And it was a promising start to life in Turkey. He impressed on his debut and scored on his second appearance for the club – a league clash against Ankaragucu.

Alli has, however, failed to recapture his form of old. At the beginning of November, Besiktas manager Senol Gunes laid into the midfielder for performing "below expectations".

"I couldn't affect the players [yet], now I can easily get through to them, but we haven't got through to Dele Alli yet," Gunes said.

"Let's not discuss Dele Alli as a player, but he is below expectations in terms of efficiency."

And it hasn't got much better for the former England international, who was hauled off by Gunes in their Turkish Cup clash against third tier Sanliurfaspor on Wednesday.

After going 2-0 down with just 15 minutes played, Gunes took action by replacing Alli with former Tottenham midfielder Gedson Fernandes.

As you can see from the footage below. Alli was subsequently booed off by Besiktas supporters as he left the field of play – a moment that brought sympathy from some on social media.

One fan said: "I hope things can change for Dele Alli in Turkey," while another commented: "Love him or hate him, it’s genuinely heartbreaking to see how bad Dele Alli fell off. This boy was on top of the world not long ago."

A third wrote: "So sad to see his career fall off so dramatically."

Earlier this month, Besiktas' sporting director Ceyhun Kazanci said Alli is working hard to improve.

"No one can answer whether Dele Alli can do it right now," Kazanci told TRT Spor. "He is working very hard. He is a player who reached €100m [in value] three years ago. He had a fall."

Back in September, former Spurs manager Harry Redknapp ripped into Alli after recommending his nephew, Frank Lampard, to sign the midfielder at Everton.

Redknapp told talkSPORT: “I called Frank and said, ‘take the chance on Dele Alli. He’s got fantastic ability and you can get him going’.

“Going to a big club like Everton could give him a big lift and Frank said he was down the road already and I said, ‘brilliant, I think he’ll be great for you’.”

Redknapp then branded Alli’s time on Merseyside as a ‘disaster’, saying: “He was a disaster, a disaster. I watched him play and he loses the ball, he walks and doesn’t run, I don’t know what’s happened to him.

“He’s gone to Turkey, where is his career going?

“He turned up to sign for Everton in a Rolls Royce into a working class, council area surrounded by old houses painted blue and white where people live for their football.

“He turned up in a Rolls Royce, who does he think he is?”