Sam Kerr scored on her first Chelsea appearance for 20 months as the champions maintained their perfect start to the Women's Super League season with a 3-1 win away to Aston Villa. The Australia international scrambled the ball home in stoppage time after being sent on as a substitute in the second half, as Sonia Bompastor's side were made to work for their victory by a dogged home performance at Villa Park. Aggie Beever-Jones had earlier given Chelsea the lead with her second of the season before Ebony Salmon levelled. A Missy Bo Kearns own goal made it 2-1 before Kerr capped her comeback from an anterior cruciate ligament injury.