Some United fans have taken this as a hint that Lukaku could become Manchester United’s sixth summer signing - and have reacted on Twitter accordingly.
But it’s important to note that Depay and Lukaku are good friends. Indeed, just five weeks ago Depay posted a photo alongside his mate, informing fans that they’ve known each other since they were 12 years old.
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Depay posted his latest photo alongside the comment: “Me and @romelulukakubolingoli10 in an conversation. See you soon B”
In truth, there’s probably little for Manchester United fans to get too excited about here. However, it’s still a little mischievous from Depay, who would have been fully aware how many supporters would react to this latest post.
United fans expect another striker to sign
United fans still expect Louis van Gaal to bring in at least one new striker this summer, following the departures of Robin van Persie and Radamel Falcao, and Lukaku was linked with a move to the Red Devils a couple of months back.
Van Gaal is prepared to put his faith in captain Wayne Rooney as his first-choice centre-forward this season - even though his recent quotes suggest he would still prefer to play the England skipper in a deeper position - but is still on the hunt for a back-up option.
The Dutch coach has tried out Depay in a central role during the Red Devils’ pre-season tour of the United States, while Adnan Januzaj scored a great goal after coming on as a second-half substitute against Barcelona on Saturday.
There’s still a real possibility that the technically-gifted Belgium international will be converted into a centre-forward.
Romelu Lukaku could be too expensive
But Lukaku, who scored a hat-trick against Hearts at the weekend, is an out-and-out centre-forward who has scored goals in the Premier League on a consistent basis over the past couple of years.
The former Chelsea striker netted 17 in 35 for West Brom during the 2012-13 campaign, 15 in 31 a season later on loan with Everton, and 10 in 36 last season with the same club.
Although the final figure is less impressive, he still managed to end the season with 20 goals in all competitions thanks to eight goals in nine Europa League appearances.
United fans react on Twitter
Even if Manchester United wanted to sign Lukaku this summer, though, it would cost them a fortune.
Everton paid a club-record fee of £28 million to sign the 22-year-old last summer, and it would take an astronomical fee with the Red Devils to convince the Toffees to sell their prized asset.
Manchester United fans: would Romelu Lukaku be a decent signing for your team? Have your say in the comments below!