diff --git a/app/controllers/matches_controller.rb b/app/controllers/matches_controller.rb
index 778fca9..7c0c012 100644
--- a/app/controllers/matches_controller.rb
+++ b/app/controllers/matches_controller.rb
@@ -4,6 +4,19 @@ class MatchesController < ApplicationController
   before_action :set_match, only: %i[show update]
   before_action :validate_params, only: %i[update]
   before_action -> { require_owner! @match.owner }, only: %i[update]
+  before_action :set_tournament, only: %i[index]
+
+  # GET/tournaments/1/matches
+  def index
+    matches = if match_params['state'].nil?
+                @tournament.matches
+              else
+                @tournament.matches.select do |m|
+                  m.state == match_params['state']
+                end
+              end
+    render json: matches, each_serializer: MatchSerializer
+  end
 
   # GET /matches/1
   def show
@@ -61,6 +74,10 @@ class MatchesController < ApplicationController
     @match = Match.find(params[:id])
   end
 
+  def set_tournament
+    @tournament = Tournament.find(params[:tournament_id])
+  end
+
   def match_params
     params.slice(:state).permit!
   end
diff --git a/app/models/tournament.rb b/app/models/tournament.rb
index ec71609..d91ec72 100644
--- a/app/models/tournament.rb
+++ b/app/models/tournament.rb
@@ -16,6 +16,10 @@ class Tournament < ApplicationRecord
 
   after_initialize :generate_code
 
+  def matches
+    [stages.map(&:matches), stages.map { |s| s.groups.map(&:matches) }].flatten
+  end
+
   private
 
   def generate_code
diff --git a/config/routes.rb b/config/routes.rb
index 61901bd..143d90c 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -13,6 +13,7 @@ Rails.application.routes.draw do
   resources :teams, only: %i[show update]
   resources :tournaments do
     resources :statistics, only: %i[index]
+    resources :matches, only: %i[index]
   end
   resources :match_scores, only: %i[show update]
   resources :groups, only: %i[show]
diff --git a/spec/controllers/matches_controller_spec.rb b/spec/controllers/matches_controller_spec.rb
index 061c4e8..d36e9ba 100644
--- a/spec/controllers/matches_controller_spec.rb
+++ b/spec/controllers/matches_controller_spec.rb
@@ -2,6 +2,13 @@
 
 require 'rails_helper'
 
+def test_get_index_with_filter(filter_state)
+  get :index, params: { state: filter_state, tournament_id: @tournament.to_param }
+  deserialize_response(response).each do |match|
+    expect(match[:state]).to eq(filter_state)
+  end
+end
+
 RSpec.describe MatchesController, type: :controller do
   before do
     @match = create(:match, state: :not_started)
@@ -12,6 +19,32 @@ RSpec.describe MatchesController, type: :controller do
     @match.match_scores = create_pair(:match_score)
   end
 
+  describe 'GET #index' do
+    context 'on a running group stage' do
+      before do
+        @tournament = create(:group_stage_tournament, match_factory: :running_group_match)
+        @tournament.matches.each_with_index do |m, i|
+          m.state = :not_started if i.even?
+          m.save!
+        end
+      end
+
+      it 'filters running matches when told to do so' do
+        test_get_index_with_filter('running')
+      end
+
+      it 'filters not_started matches when told to do so' do
+        test_get_index_with_filter('not_started')
+      end
+
+      it 'doesn\'t break if the filter contains rubbish' do
+        get :index, params: { state: 'saftladen', tournament_id: @tournament.to_param }
+        body = deserialize_response response
+        expect(body.empty?).to be true
+      end
+    end
+  end
+
   describe 'GET #show' do
     it 'should return success' do
       get :show, params: { id: @match.to_param }
diff --git a/spec/models/tournament_spec.rb b/spec/models/tournament_spec.rb
index 20e6f6b..a555abe 100644
--- a/spec/models/tournament_spec.rb
+++ b/spec/models/tournament_spec.rb
@@ -30,4 +30,30 @@ RSpec.describe Tournament, type: :model do
     it { should have_many :teams }
     it { should have_many :stages }
   end
+
+  describe '#matches' do
+    context 'group stage tournament' do
+      before do
+        @tournament = create(:group_stage_tournament)
+      end
+
+      it 'returns only matches' do
+        @tournament.matches.each do |m|
+          expect(m).to be_a Match
+        end
+      end
+    end
+
+    context 'stage tournament' do
+      before do
+        @tournament = create(:stage_tournament)
+      end
+
+      it 'returns only matches' do
+        @tournament.matches.each do |m|
+          expect(m).to be_a Match
+        end
+      end
+    end
+  end
 end