RB Leipzig moved back to the top of the Bundesliga on Saturday night thanks to a 2-1 win over Schalke.
Serge Gnabry has claimed Arsenal "badly wanted to keep him" before he moved to Werder Bremen last summer.
Bayern Munich bounced back from defeat to Borussia Dortmund a week ago with a 2-1 win at Bayer Leverkusen to stay second in the Bundesliga.
Hoffenheim extended their unbeaten start to an 11th game with a 2-2 draw against Hamburg, who remain rooted to the foot of the Bundesliga.
Werder Bremen have had a dig at Arsenal after Serge Gnabry's hat-trick for Germany - but the Gunners have hit back.
RB Leipzig joined Bayern Munich at the top of the Bundesliga on Sunday after a 3-1 win against Mainz saw them equal a league record.
Bayern Munich opened up a gap at the top of the Bundesliga with a second victory over Augsburg on Saturday.
Leipzig closed the gap on Bayern Munich at the top of the Bundesliga to two points thanks to a 3-1 win over Werder Bremen on Sunday.
Bayern Munich drew their second Bundesliga game in a row on Saturday as they were held by Eintracht Frankfurt.
Per Mertesacker has discussed the possibility of rejoining Werder Bremen, according to the German club's captain.
Bayern Munich opened up a three-point lead at the top of the Bundesliga with victory over Hamburg on Saturday.
Bayern Munich moved two points clear at the top of the Bundesliga with a 3-0 win over Hertha Berlin at the Allianz Arena on Wednesday.
Werder Bremen have sacked coach Viktor Skripnik after the club's disastrous start to the Bundesliga season.
Bayern Munich opened up a two-point advantage at the top of the Bundesliga after a 3-1 win over Ingolstadt on Saturday.
Hoffenheim fought back to draw 4-4 with Mainz, while Augsburg came from behind to beat Werder Bremen in the Bundesliga on Sunday.
Robert Lewandowski scored a hat-trick as Bayern Munich beat Werder Bremen 6-0 in their Bundesliga opener.
Werder Bremen are interested in signing Celtic defender Emilio Izaguirre, according to Sky sources.
Papy Djilobodji is keen to prove his critics wrong after joining Sunderland on a four-year contract in an £8m deal from Chelsea.
Chelsea ended their pre-season campaign on a high with a 4-2 win over Werder Bremen at the Weserstadion in Germany.
Chelsea will play Werder Bremen in Germany on August 7 as part of their pre-season preparations.