England international Karen Carney scored on her Chelsea debut to help the Women's FA Cup holders beat Doncaster 4-1 and progress to the quarter-finals.
Jess Sigsworth put the Belles ahead but a Leandra Little own goal, Carney's strike and goals from Ji So-Yun and Eniola Aluko saw Chelsea through.
Meanwhile, Rachel Yankey made her Notts County debut as last season's beaten finalists beat WSL 2 side Durham 3-1.
Arsenal beat Birmingham City 5-3 on penalties after the tie finished 1-1.
Jade Boho Sayo scored on her Reading bow as they overcame WSL 2 side Millwall 2-0, and Hannah George scored the only goal of the game as Aston Villa edged past Everton 1-0.
Brooke Chaplen scored both goals as Sunderland triumphed over Yeovil Town, while Samantha Conroy scored twice for Sporting Club Albion as they survived a fight back from Brighton to win 4-3 and progress as the only side from outside the WSL in the last eight.
On Saturday, Manchester City became the first side to go through to the quarter-finals after beating Liverpool 2-0.
Attention next turns to the league this week, with Chelsea again making the trip to Doncaster to begin their Women's Super League One defence on Thursday.