Joe Cole believes Frank Lampard must take a great deal of credit if Chelsea complete an FA Cup and Champions League double this month.
Lampard was sacked earlier in the season to make way for Thomas Tuchel, the German overseeing a remarkable turnaround in Chelsea's fortunes, guiding them to two major finals and steering them towards a top-four finish in the Premier League.
Cole and Lampard were Chelsea team-mates for seven seasons and also played together for West Ham and England.
While Cole acknowledges the work Tuchel has done, he believes Lampard's 18-month spell as manager also helped drive the club to the brink of a hugely successful season.