Kulusevski, who has been sidelined for more than a year with a serious knee injury, was pictured working with a ball in training footage released by Spurs on Wednesday and shown by the Daily Mail, alongside fellow winger Mohammed Kudus, who has been out since January with a thigh problem.
Neither player has returned to full first-team training, and manager Roberto De Zerbi is taking a deliberately cautious approach, keen to avoid placing pressure on Kulusevski to hit a specific comeback date.
The Sweden international has not played since suffering the injury against Crystal Palace in May 2025, weeks before Tottenham won the Europa League; he underwent surgery on his right patella and required a second, minor operation in March after ongoing discomfort in the joint delayed his recovery. The setback also cost him a place at this year's World Cup.
Elsewhere, Lincoln City have signed 18-year-old striker Mason Melia on a season-long loan from Tottenham, with the Championship new boys fending off interest from as many as 30 other clubs to land the Republic of Ireland international.
Melia, who joined Spurs from St Patrick's Athletic in January in a deal that could rise to €4m with add-ons, made his first Tottenham appearance as a substitute against Sydney FC in a pre-season friendly last week, and has already won two senior caps for Ireland, debuting against Qatar in May.
Lincoln sporting director Jez George said the club had tracked Melia since his time under Stephen Kenny at St Patrick's, adding: "It has been well documented in the press that we beat up to 30 other clubs for his signature, and he is an exceptional talent who we feel can make a big impact for us in the Championship."
Melia becomes Lincoln's fourth summer signing, following Callum Elder, Andrei Coubis and goalkeeper Joe Gauci through the door at Sincil Bank. The club have also tied down academy graduates Freddie Draper, Reeco Hackett and Dom Jefferies to new contracts as they prepare for their first season in the second tier since the early 1960s.
"The ambition of the club really stood out to me," Melia told Lincoln's website. "Our first conversation was a bit mad because we were trying to work around all the different time zones while I was in Australia, but once we got everyone together the presentation was unbelievable."