After Chelsea’s 3–0 loss to Brentford on Friday, 18 September 2026, in Premier League matchday 5, the Blues are now statistically the worst defensive side so far this season, having conceded 12 goals in five matches.

Across their first five fixtures of the 2026/27 season, Chelsea have managed two wins, one draw and two defeats.
Here are Chelsea’s opening five matches:
- ❌ Loss vs Brentford
- ❌ Loss vs Arsenal
- 🤝 Draw vs Hull City
- ✅ Win vs Leeds
- ✅ Win vs Fulham
Chelsea signed Emiliano Martínez believing the club’s issues were rooted in goalkeeping, but it has been a difficult start for the Argentine.

Since making his debut, Martínez has conceded 8 goals in 4 matches, with Chelsea suffering two defeats and one draw in that period.
Softfootball also highlights that Cole Palmer was everywhere during the Brentford match. Palmer made more tackles (3) and more dribbles (2) than any other player in the first half.

On the other hand, history was made:

The first player born in the 2010s to make a Premier League appearance and now Chelsea’s youngest-ever player in the competition – Photo Credit : Chelsea, X
Mahdi Nicoll‑Jazuli became the first player born in the 2010s to make a Premier League appearance and is now Chelsea’s youngest‑ever player in the competition. He came on in the 86th minute for Pedro Neto.
Brentford remain unbeaten so far, with 2 wins and 3 draws from their first five matches of the 2026/27 Premier League season, sitting 4th as of Saturday, 19 September 2026.