American Joseph Gyau, a fleet-footed winger whose career was derailed for two years by knee problems, will continue his resurgence next season at Duisburg, a German second-division club.

The move from third-tier Sonnenhof, first reported by the Insider two weeks ago, became official Thursday. He signed a two-year contract. There was no transfer fee.

Gyau, 25, scored five goals in 30 appearances this season for Sonnenhof, his home for 18 months.

As the Duisburg move was being finalized this week, he wrote of Sonnenhof on Instagram: “They took a chance and believed in me when a lot of people said I was done. I regained form and confidence this season. I wish you all nothing but the best in the future going forward.”

Gyau is from Silver Spring, Md., and has spent his entire career in Germany, first with Hoffenheim, then St. Pauli on loan and Borussia Dortmund. He got into three Bundesliga matches in 2014: two with Hoffenheim in the spring and one with Dortmund in the fall. In October of that year, starting against Ecuador in his second U.S. national team appearance, he suffered a knee injury that, even after surgery, grew worse and threatened to end his career.

Duisburg was tied for the fourth-most points in 2. Bundesliga this season but, through goal differential, finished seventh.

“Joe is a very fast winger,” sports director Ivica Grlic said. “We want him to take the next step and make our offensive game even more unpredictable.”

>> Cameron Carter-Vickers, a 20-year-old center back who earned his first U.S. cap last fall and started against Paraguay in March, has extended his contract with Tottenham Hotspur through 2021. He spent this past season on loan in the second-tier Championship with Sheffield United and Ipswich Town, making 34 combined league starts.

Spurs will decide in preseason whether he will go back on loan or stay with the first team in London. His four appearances with Spurs came in the 2016-17 League Cup and FA Cup.

Given his recent U.S. activity, Carter-Vickers is a prime candidate for selection to the friendlies at Ireland and France next month. (Some foreign-based players will also receive invitations to the May 28 friendly against Bolivia in Chester, Pa.)

>> Ahead of the summer schedule, the Insider has learned the U.S. Soccer Federation has inquired about Theoson-Jordan Siebatcheu, who scored 17 goals for Reims, the French second-division champion. It’s unclear whether a formal invitation was offered or whether he accepted. The USSF will unveil the roster for the Bolivia match this Sunday and announce the list for the European games before the trip.

The 22-year-old forward was born in Washington and raised in France. He is eligible to play for the United States, France and Cameroon. Last year, he represented the French under-21 squad.

>> In Germany, U.S. defender John Brooks and Wolfsburg will try to stave off relegation with a two-leg playoff against promotion-hopeful Holstein Kiel. The first leg is today at Wolfsburg (2:30 p.m. ET on FS1, Fox Deportes, Fox Sports Go, fuboTV). The return leg is Monday in Kiel. Wolfsburg avoided automatic relegation by finishing third-to-last in the Bundesliga, while Holstein Kiel missed automatic promotion from the second tier by placing third.

>> In Mexico, U.S. defender Jorge Villafaña and Santos Laguna begin the Clausura finals tonight at home against Toluca (9 p.m. ET on Univision). The second leg is Sunday night.

>> In England, Heather O’Reilly entered in the 66th minute of Arsenal’s 2-0 victory at Sunderland. Zaneta Wyne, a Southern California native who played at the University of New Mexico, went 90 for the home side.

>> In Israel, Jack Rozhansky came on in the 54th minute of Macabi Netanya’s 5-0 home defeat to Bnei Yehuda