The Netherlands international was heavily linked with a move away from St. Mary’s over the summer, however, the Saints managed to keep the centre half.
“I’m glad I’m fit again and I can give up 100 per cent,” Van Dijk, who was touted by Liverpool and Chelsea amongst others, told Dutch channel Fox Sports.
“I’m not sorry for anything. Of course, I wanted to make a step up, but Southampton did not want me to sell me, but you’re a professional, so now I’ll give everything to the club.
“Halfway through the season, maybe we can see what’s possible.”
Saints boss Mauricio Pellegrino bolstered his defensive ranks over the summer, with Van Dijk’s international teammate Wesley Hoedt joining from Lazio as well as former Lech Poznan defender Jan Bednarek.