The three Bundesliga sides with 100 per cent records can all overtake league leaders Bayern Munich this weekend.
Pep Guardiola's men dropped their first points of the season against Freiburg on Tuesday, and the trio of sides on nine points - Borussia Dortmund, Leverkusen and Mainz - will all be looking to take advantage.
Dortmund travel to Eintracht Frankfurt on Sunday, with the hosts having picking up their first points of the campaign last time out against rock-bottom Eintracht Braunschweig.
Jurgen Klopp's charges have conceded just one goal in their three-game winning run as they look to go one better than last term's second-place finish.
Dortmund's last game brought a 1-0 victory against Werder Bremen and, despite an inability to convert all their chances, the 46-year-old is pleased with his side's start to the campaign.
"If you have nine points from three games, and poor finishing is the only point of criticism, then I think I can handle it," he told the club's official website.
Leverkusen are another side to have won all their games, with an in-form Sidney Sam helping his team to a 4-2 victory over Borussia Monchengladbach with a double in their last outing.
Sami Hyypia's men will face a Schalke side buoyed by their UEFA Champions League progression and the news that striker Adam Szalai will not require surgery on a hand injury.
Fourth-place Mainz will look to the Bundesliga's leading scorer Nicolai Muller to help continue their winning streak against Hannover on the road.
Muller has netted four times so far; half the total he achieved in the whole of last season.
Hannover, managed by Mirko Slomka, have enjoyed a mixed start to their league campaign, suffering defeat against Borussia Monchengladbach either side of victories versus Wolfsburg and Schalke.
Hertha Berlin have made a strong start on their return to the top flight and will look to build on their win over Hamburg when they face Wolfsburg.
At the foot of the table, Braunschweig can pick up their first points of the season against Hamburg, a side just three places above them in the table.
Neither side have picked up a win yet, with Thorsten Fink's men shipping six goals in their last two Bundesliga matches.
Stuttgart are also without a win and sit in 17th. They face the league's top scorers Hoffenheim, who have scored 10 goals so far this season.
Sixth-place Werder Bremen will look to bounce back from their narrow defeat to Borussia Dortmund when they face Monchengladbach.
Robin Dutt's side have conceded just once this season and have been boosted by the return to training of Lukas Schmitz following a foot injury.
"What's important is that we have only conceded one goal in three matches," Schmitz told the club's official website.
"You can see the handprint of Robin Dutt, who said from the first day on that we have to have a strong order and play well in the back first.
"That has worked really well thus far and I think if we can do that throughout the whole season, it would be the foundation for a good season."
The other game of the Bundesliga weekend sees a mid-table battle between Nuremberg and Augsburg.
|Coach: A. Veh|
for C. Djakpa 66'
for J. Flum 71'
for T. Inui 83'
|Serie A Review: El Shaarawy at the double in Milan victory, Fiorentina edge five-goal thriller|
|Taylor close to signing new Swansea contract|
|Milan 3 Torino 0: El Shaarawy grabs brace as Inzaghi´s men ease to victory|
|Bruce expresses sympathy with Hull owner and fans following relegation|
|Preston North End 4 Swindon Town 0: Beckford hat-trick seals promotion|
|Darmstadt promoted back to the Bundesliga after 33-year exile|
|Sherwood to assess Given injury ahead of FA Cup final|
|Europa League qualification would cap ´special´ season - Koeman|
|South Africa 0 Botswana 0 (6-7 on penalties): Hosts exit COSAFA Cup at first hurdle|
|Pearson hopeful of Cambiasso stay|
|Ings emotional after victorious ´last game´|
|Pochettino happy to finish fifth|
|West Brom release Mulumbu|
|Monk: Palace defeat not a reflection on season|
|LVG awaits news on ´minor´ Di Maria injury, refuses to comment on Falcao exit reports|
|Pulis accepts blame for West Brom´s Arsenal collapse|
|Toure and Milner were not saying goodbye - Pellegrini|
|Ramsey calls for patience in QPR rebuild|
|Allardyce: Time is right for West Ham exit|
|Mourinho already preparing for title defence|
|Eredivisie Review: Heerenveen to play Vitesse for Europa League place|
|Hughes hails Stoke showing|
|Carver still hoping to land Newcastle job|
|Sunderland squad needs better balance, says Advocaat|
|Pardew ´never dreamt´ of top-half finish at Palace|
|Survival Sunday: How the final-day Premier League relegation battle played out|
|Arsenal wanted Walcott stay regardless of hat-trick - Wenger|
|Bruce: Hull have not been good enough|
|De Gea has to say something - Van Gaal|
|Rodgers apologises after ´embarrassing´ defeat|
|Chelsea 3 Sunderland 1: Remy double secures win as Drogba bids farewell|
|Stoke City 6 Liverpool 1: Gerrard nets consolation in final-game thrashing|
|West Ham confirm Allardyce exit|
|Newcastle United 2 West Ham 0: Gutierrez on target as Carver´s men stay up|
|Crystal Palace 1 Swansea City 0: Chamakh earns season-closing win|
|Manchester City 2 Southampton 0: Lampard bids Premier League farewell with goal|
|Hull City 0 Manchester United 0: Bruce´s men relegated|
|Aston Villa 0 Burnley 1: Ings heads winner|
|Everton 0 Tottenham 1: Kane header seals fifth place|
|Leicester City 5 QPR 1: Vardy celebrates England call-up in style|
|Arsenal 4 West Brom 1: Wilshere screamer and trio for Theo secures third|
|Drogba carried from the pitch by Chelsea team-mates|
|Scottish Premiership Review: United take Dundee derby spoils, Celtic smash Inverness|
|Ashley not leaving Newcastle until club wins something|
|Klopp urges fans not to draw comparisons with Tuchel|
|Dortmund complete Castro capture|
|Stevens leaves Stuttgart after securing safety|
|Alves ruled out of Copa with serious knee injury|
|Drogba to leave Chelsea|
|Ashley is from another planet - Keegan|
|Sydney withdraw Janko offer amid talk of Toni|
|Cameron pens Stoke extension|
|Wimmer: I´m going to Tottenham|
|Returning Grabban ready for play-off final - Neil|
|Ferdinand ´overwhelmed´ by support following wife´s death|
|Odegaard enjoys ´nervous´ Real Madrid debut|
|Bamford fit but may be overlooked for play-off final|
|Barcelona´s best better than Real´s - Luis Enrique|
|Ancelotti laments key injuries in title failure|
|AFC Champions League Preview: Evergrande, Al Hilal desperate for wins|
|MLS Review: DC United deny nine-man Revolution, Rapids break drought|
|Bielsa hints at Marseille departure, congratulates Ligue 1|
|Silva, Matuidi eye fourth trophy|
|Jonas deserved golden boot - Jorge Jesus|
|Primeira Liga Review: Benfica celebrate title with home win|
|Ligue 1 Review: Monaco seal final Champions League spot, Marseille take fourth|
|Ancelotti to take sabbatical if sacked by Real|
|Mancini annoyed by ´absurd´ Inter mistakes|
|Simeone hails ´incredible season´|
|Replacing Xavi will be impossible - Luis Enrique|
|Ronaldo hopes Ancelotti will stay|
|Guardiola: We´ll be back stronger|
|Paris Saint-Germain 3 Reims 2: Cavani double sees champions celebrate title with routine win|
|Garitano stands down following Eibar relegation|
|Genoa 3 Inter 2: Kucka strikes blow to visitors´ Europa quest|
|Real Madrid 7 Getafe 3: Ronaldo nets treble and Odegaard makes history|
|Southend United 1 Wycombe Wanderers 1 (aet, 7-6 on penalties): Last-gasp Pigott and Bentley the hero|
|Odegaard becomes Real´s youngest player|
|Gargano omitted from Uruguay Copa America squad|
|La Liga Review: Depor save themselves with stunning comeback at Barca|
|Barcelona 2 Deportivo La Coruna 2: Salomao saves visitors as Xavi bids Camp Nou farewell|
|Granada 0 Atletico Madrid 0: Atleti secure third as hosts survive|
|Juventus 3 Napoli 1: Champions turn on the style|
|Tearful Klopp struggled to say goodbye|
|Scottish Premiership Review: Rangers to meet Motherwell in play-off final|
|Bundesliga Review: Freiburg and Paderborn relegated|
|Borussia Dortmund 3 Werder Bremen 2: Dortmund seal European spot as Klopp says farewell|
|Bayern Munich 2 Mainz 0: Schweinsteiger nets as champions celebrate title|
|Championship play-off final Preview: Karanka and Neil eye swift ascent to Premier League|
|Volland commits to Hoffenheim|
|Monk: Michu likely to move on|
|Allardyce not interested in Newcastle revenge|
|Sherwood confident of Benteke Villa stay|
|Rodgers calls on Liverpool fans to support Sterling|
|Khedira ´frozen out´ by Real|
|Hamstring injury rules Suarez out of Deportivo clash|
|Former Southampton managers hail ´excellent season´|
|Mourinho wants to remain in England after Chelsea|
|Rodgers ´150 per cent sure´ his job is safe|
|Maldini would ´love´ to help Milan|
|Doyle set for Rapids debut versus Whitecaps|
|MLS Review: Champions end winless run on day of late drama|
|Jemez doubted Rayo future|
|Zenga could replace Mihajlovic - Osti|
|Blanc wants to avoid Chelsea-like finish|
|Menez happy in Milan|
|Sherwood: Vlaar wants to stay|
|Arsenal v West Brom: Wenger calls for focus|