Chelsea moved nine points clear at the top of the Women’s Super League as Guro Reiten’s 84th-minute penalty secured a 1-0 victory over third-placed Arsenal at Stamford Bridge. A scrappy encounter looked to be drifting towards a stalemate when two substitutes turned the tide for Sonia Bompastor’s side in a dramatic finale.

Guro Reiten's 83rd-minute penalty helped Chelsea secure a 1-0 win over Arsenal in the Women's Super League, maintaining their top position. Arsenal's Katie McCabe was sent off, affecting the Gunners' title chances.

Chelsea's Guro Reiten speaks to BBC Sport as she looks ahead to playing Arsenal in the Women's Super League.

Lauren James, after more than three months off the pitch, gets Chelsea Women a penalty opportunity and a double yellow card for Katie McCabe as the Arsenal player fails to accept that Lauren owns the Gunners. Guro Reiten steps up to the spot and does one of the many things she does at the greatest level: convert the spot kick for the Blues.

Guro Reiten secured Chelsea's victory over Arsenal with an 83rd-minute penalty in front of 34,302 fans at Stamford Bridge. Despite a strong performance from Arsenal, Chelsea remains unbeaten in the Women's Super League,

Chelsea midfielder Guro Reiten says Women's Super League matches against Arsenal "mean something extra" because of the rivalry between the teams.

Chelsea's Guro Reiten scored a late penalty to secure a 1-0 win over Arsenal, maintaining their lead in the Women's Super League. Arsenal's Katie McCabe was sent off, and Crystal Palace lost to Tottenham.

Sonia Bompastor's Chelsea remain top of the division after winning 11 of their 12 games to start the campaign, with this win moving them nine points clear of second-place Manchester City and 10 ahead

The WSL is not a three-tier league, it’s a four-tier one, because the reality is that Chelsea are operating in a league of their own. A 1-0 win for Sonia Bompastor’s side over closest rivals Arsenal means they remain unbeaten and sit top with a surely unassailable nine-point lead.

Chelsea beat Arsenal to move nine points clear at top of WSL - Guro Reiten scores late penalty as Blues strengthen grip on title

The WSL is often described as a three-tier league made up of the battle to avoid relegation, the fight for the title and the struggle to be best of the rest. That is not the reality though, because there is no competition at the top and Chelsea are operating in a league of their own above the rest.