bundesliga.com previews a meeting between two sides that have won just one game between them in the last month...
Without a league win since getting the better of FC Augsburg on Matchday 8, Mainz are slowly being dragged in the direction of the bottom three. Die Nullfünfer are only three points better off than 16th-placed SC Freiburg and 17th-in-the-table SV Werder Bremen, and just four ahead of bottom club Stuttgart.
Summer signing Jairo Sampeiro (r.) could get the nod over Serbian midfielder Filip Djuricic after impressing from the bench in last weekend's 2-1 defeat to Hamburger SV, but there'll be no place in the squad for injured quartet Niko Bungert, Julian Baumgartlinger, Christoph Moritz and Jonas Hofmann.
Georg Niedermeier will likely come in at centre-half for Germany international Antonio Rüdiger (l.), who underwent knee surgery earlier this week. Daniel Didavi could make the squad following a spell on the sidelines, but the game comes too soon for strike duo Vedad Ibisevic and Mohammed Abdellaoue.
Okazaki grabbed a modest ten goals during a two-year spell at Stuttgart, but has since found the net 23 times in 46 top-flight outings for Mainz. Eight have come this season, although it's fast approaching three months since the Japanese international scored in a 05ers' win (against Borussia Dortmund on Matchday 4).
There's arguably no other player in the Bundesliga that knows Okazaki better than experienced wing-back Gotoku Sakai. The Blue Samurai star does most of his defensive work on the flanks, but will be expected to drop inside from time to time to pick up the runs of Mainz's leading marksman.
Kasper Hjulmand (Mainz head coach): "We have to go back to the way we were playing at the start of the season against Stuttgart."
Huub Stevens (Stuttgart head coach): "It wasn't all bad against Schalke - a lot of it was, but not everything."
A quick look at the form table says it all about the struggling duo. Mainz are the only Bundesliga side not to have won a single one of their last five outings and while Stuttgart managed to pick up three points against SC Freiburg on Matchday 13, they remain the division's most porous outfit alongside Bremen (31 goals against).
Okazaki scored in both fixtures against his former employers last season as Mainz recorded a 3-2 win at the Coface Arena and a 2-1 win in Stuttgart. Die Schwaben are now without an away win over der Karnevalsverein in over nine years.
Mainz: Karius - Brosinski, Bell, Noveski, Junior Diaz - Geis, Soto - Koo - Jairo, Allagui - Okazaki
Stuttgart: Ulreich - Klein, Baumgartl, Niedermeier, G. Sakai - Gruezo, Gentner - Sararer, Didavi, Werner - Harnik
Find out where you can watch Saturday's game on our list of broadcasters
Check out Shinji Okazaki's top five Bundesliga goals on the official Bundesliga YouTube channel: