Sancho has insisted he has put his Manchest United transfer saga behind him and is "raring to go" again at Borussia Dortmund after scoring in the weekend win over RB Leipzig.
The 20-year-old winger missed out on a summer switch to Old Trafford as United refused to meet Dortmund's £108million asking price.
"Obviously this season has been very difficult for me personally," Sancho said.
"So I knew when I went away, I just focused on my game and came back raring to go.
"I'm working hard every day in training and on the pitch so I'm just happy to get my goals and assists."
After the match, Dortmund boss Edin Terzic discussed Sancho's contribution and outlined his hopes for further improvement to come.
"We spoke a lot but Jadon was always doing his best in the last weeks and months, but sometimes it's like that," Terzic said of the youngster's difficult spell.
"Players are not always performing on this level. He knew that. He stayed hungry and we tried to support him as a team.
"We tried to support him individually. It worked out well in the last three games. He scored three goals, and now three assists also.
"He's in a good way to get into his best form."