Transfer rumour · 2026

Mamadou Sarr to Real Sociedad

Chelsea → Real Sociedad · Probability 88% · fee €32m–€45m · imminent

Updated 24 Aug 2026

Chelsea and Real Sociedad have reached a verbal agreement to send 20-year-old defender Mamadou Sarr to San Sebastián on loan, with no buy option included.

Stage: Link → Interest → Advanced → Agreed → Corroborated → Here we go

Where Mamadou Sarr could go: Real Sociedad 88% · stays 12%

How the story has moved

1. Santi Aouna · Interest · 2026-08-19
   “🚨EXCL: 🔵🇸🇳 #PL | ❗️La Real Sociedad veut récupérer Mamadou Sarr en prêt. 🇸🇦 Al-Hilal tente également le coup pour le défenseur sénégalais de Chelsea. Discussions en cours ent”
2. Santi Aouna · Fee agreed · 2026-08-24
   “🚨🔵🇸🇳 #Liga | 🤝 Accord trouvé entre Chelsea et la Real Sociedad pour le prêt de Mamadou Sarr. 🔄 Le défenseur français va rejoindre le club espagnol sans option d’achat. ❗️ Xab”
3. Sacha Tavolieri · Advanced talks · 2026-08-24
   “🔵 🇸🇳 Talks are still ongoing between Real Sociedad and Chelsea over Mamadou Sarr’s move to La Liga. ⏳ More to come soon! #mercato #CFC https://t.co/7g76TC4Uct”
4. Santi Aouna · Fee agreed · 2026-08-24
   “🚨🔵🇸🇳 #Liga | 🤝 Accord trouvé entre Chelsea et la Real Sociedad pour le prêt de Mamadou Sarr. 🔄 Le défenseur sénégalais va rejoindre le club espagnol sans option d’achat. ❗️ X”
5. Fabrizio Romano · Here we go · 2026-08-24
   “🚨🔵⚪️ Real Sociedad reach verbal agreement to sign Mamadou Sarr on loan from Chelsea, here we go! Clubs to prepare paperwork after the game but Sarr not involved tonight as Real w”

The money

The fee for Mamadou Sarr is reported around €32m–€45m, against a market value of €19m.

• Mamadou Sarr profile, value & stats
• Real Sociedad transfers & squad
• Chelsea transfers & squad
• La Liga transfer rumours, scored
• All live transfer rumours, scored by probability

Read the full briefing, the sources behind it and the money trail. Open on transfertracker.ai