Bartosz Bialkowski, along with David Raya, enjoyed a league-best 16 shut-outs last term
Goalkeeper Bartosz Bialkowski has triggered a further one-year contract extension at Millwall.
Bialkowski, 33, signed for the Lions on a permanent basis in January, after impressing on loan from Ipswich Town.
The Poland international recorded a joint-highest 16 clean sheets in the Championship in 2019-20, and has eight this season.
He has conceded 75 goals in 71 games for Millwall, with a career tally of 497 in 391 matches and 106 shut-outs.
Southampton bought the Braniewo-born keeper from Gornik Zabrze in January 2006.
He subsequently spent six seasons at St Mary's before spells at Notts County and Ipswich.
Source: bbc.com