Bergvall's younger brother Lucas Bergvall was signed by Spurs in January and will officially leave DIF for London this summer.
The connection led to Theo having treatment on his calf injury.
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"They opened a door for us. They diagnosed me, you could say. They offered to take me in and check on me. It was very nice," Theo told Fotbollskanalen.
Theo is happy making a playing return.
"It felt good. It was fun. I have longed for this. It has been tough months," the 19-year-old added.