It's not confirmed but Espabox writes that the opponent for 45-year old Sergio "Maravilla" Martinez could be Jose Manuel Fandino (15-6) on August 22 in Torrelavega.

Martinez (51-3-2) has been out of the ring for six years, since suffering a knockout loss at the hands of Miguel Cotto in 2014.

The "new" Universum Box Promotion join forces with a local partner returns after the corona-related break with a show at a drive-in cinema in Duesseldorf on July 11.

Light heavyweight James Kraft (17-0-1) headlines against better-than-his record indicates, Czech Karel Horejsek (17-12-3). In the co-feature super welterweight Ali Dohler (3-0) is in tough against experienced Frenchman Fouad El Massoudi (17-12).

In October Universum will stage a show topped by an IBO eliminator between super lightweights Artem Harutyunyan (9-0) and Timo Schwarzkopf (20-4) in an all German matchup. The winner will get  a shot at Argentinean Jeremias Nicolas Ponce (25-0), who holds the IBO title.
....

Heavyweight prospect Peter Kadiru (7-0) takes on Peter Wolf (5-0) on July 11 on SES outdoor promotion in Magdeburg (Germany). Wolf lives and trains in Vienna (Austria).
...

Next for former IBF super middleweight title challenger Vincent Feigenbutz (31-3) could be a fight at middleweight against Jama Saidi (17-1) in Berlin on August 26.

As previously reported this show could be headlined by Jack Culcay vs Abass Baraou. Both matchups are very good and they all-German, and are both clashes between AGON Sports and Team Sauerland.