# RSC Anderlecht transfer activity and squad updates > Live situation record from CLSTR: https://clstr.news/situations/rsc-anderlecht-transfer-of-marten-winkler > Updated: 2026-08-31T15:01:00.000Z. Sources: 13. Developments: 3. RSC Anderlecht has officially completed the signing of German winger Marten Winkler from Hertha BSC. Winkler, noted for his speed exceeding 36 km/h, has taken over the club’s number 10 shirt. As the transfer window nears its end, the club continues to refine its roster under coach Vitor Bruno and sporting director Antoine Sibierski. Previous efforts included finalizing a deal for striker Tawfik Bentayeb and negotiating for defender Will Ferry, while phasing out players like Mario Stroeykens and César Huerta. Following a 3-0 defeat to Union SG in the Brussels derby, the club has faced scrutiny regarding its defensive stability. Analysts have specifically questioned the organization and creativity of new signings Giulian Biancone and Léo Pétrot. To address these deficiencies, Sibierski is working against UEFA deadlines to secure further reinforcements. While the club previously identified Santi Garcia and Romeo Amane as targets, recent reports indicate that potential signings could also include Arnau Comas or Ilias Koutsoupias to bolster the squad. ## Timeline ### 2026-08-31: Belgian football clubs manage transfers and derby fallout Belgian clubs Anderlecht and Standard Liège manage transfer window deadlines and performance scrutiny following Anderlecht's derby loss to Union Saint-Gilloise. 6 sources. https://clstr.news/cluster/rsc-anderlecht-targets-last-minute-transfers-after-derby-loss ### 2026-08-20: Marten Winkler joins RSC Anderlecht as new number 10 German winger Marten Winkler joins RSC Anderlecht as the new number 10, bringing high-speed attacking capabilities from Hertha BSC. 3 sources. https://clstr.news/cluster/marten-winkler-joins-rsc-anderlecht-as-new-number-10 ### 2026-08-15: RSC Anderlecht makes concrete offer for Hertha BSC winger Marten Winkler RSC Anderlecht has made a concrete offer to Hertha BSC for 23-year-old winger Marten Winkler, seeking to strengthen their offense for the upcoming season. 7 sources. https://clstr.news/cluster/rsc-anderlecht-makes-concrete-offer-for-hertha-bsc-winger-marten-winkler --- Cite as: RSC Anderlecht transfer activity and squad updates. CLSTR, https://clstr.news/situations/rsc-anderlecht-transfer-of-marten-winkler