Celtic beat Saints 2-0 in Claus Lundekvam's testimonial, while Andy Cole made his Forest debut.
Wins for Celtic, Wolves and Forest
Celtic beat Southampton 2-0 in Claus Lundekvam's testimonial, while Andy Cole made his Nottingham Forest debut against Offenbach Kickers.
Saints stalwart Lundekvam was unable to mark his special occasion with a victory as SPL champions
Celtic scored in each half.
Chris Killen scored after 26 minutes following good work by Scott McDonald, and Barry Robson netted a penalty midway through the second half after Georgios Samaras was brought down.
Matt Le Tissier came on for a late cameo for Southampton as new Celtic signing Samaras almost added a third goal.
Veteran striker Cole almost netted on his bow for
Forest when he struck the crossbar in a 2-1 win over Offenbach Kickers.
Forest's goals came courtesy of Garath McCleary and Arron Davies, while Rob Earnshaw and Guy Moussi also played.
SPL side
Aberdeen suffered a 4-0 defeat at Peterhead, with Craig Gunn, Martin Bavidge, Bobby Mann and Konrad Kozminski on target for the Second Division club.
Wolves secured a 4-1 victory at non-league Chasetown in their latest friendly, with Elliott Bennett and Stephen Elliott grabbing two goals apiece.
Plymouth Argyle twice came from behind to draw 2-2 at Kidderminster Harriers, with Jamie Mackie heading the Championship club level on each occasion.
Bristol City's pre-season trip to Portugal concluded with a 1-0 defeat to Rushden & Diamonds, with Dean McDonald scoring the game's only goal.
Cheltenham Town's fifth friendly of pre-season ended with a 0-0 draw against Telford.
Friendly results:
Chasetown 1 Wolves 4
Kidderminster Harriers 2 Plymouth Argyle 2
Offenbach Kickers 1 Nottingham Forest 2
Peterhead 4 Aberdeen 0
Rushden & Diamonds 1 Bristol City 0
Southampton 0 Celtic 2
Telford 0 Cheltenham Town 0