diff --git a/osu.Game/Online/Spectator/FrameHeader.cs b/osu.Game/Online/Spectator/FrameHeader.cs
index baebb28e4f..4d1c2c2cff 100644
--- a/osu.Game/Online/Spectator/FrameHeader.cs
+++ b/osu.Game/Online/Spectator/FrameHeader.cs
@@ -48,7 +48,7 @@ namespace osu.Game.Online.Spectator
         /// Additional statistics that guides the score processor to calculate the correct score for this frame.
         /// </summary>
         [Key(5)]
-        public Dictionary<string, object> ScoreProcessorStatistics { get; set; }
+        public ScoreProcessorStatistics ScoreProcessorStatistics { get; set; }
 
         /// <summary>
         /// The time at which this frame was received by the server.
@@ -71,13 +71,12 @@ namespace osu.Game.Online.Spectator
             // copy for safety
             Statistics = new Dictionary<HitResult, int>(score.Statistics);
 
-            ScoreProcessorStatistics = new Dictionary<string, object>();
-            scoreProcessor.WriteScoreProcessorStatistics(ScoreProcessorStatistics);
+            ScoreProcessorStatistics = scoreProcessor.GetScoreProcessorStatistics();
         }
 
         [JsonConstructor]
         [SerializationConstructor]
-        public FrameHeader(long totalScore, double accuracy, int combo, int maxCombo, Dictionary<HitResult, int> statistics, Dictionary<string, object> scoreProcessorStatistics, DateTimeOffset receivedTime)
+        public FrameHeader(long totalScore, double accuracy, int combo, int maxCombo, Dictionary<HitResult, int> statistics, ScoreProcessorStatistics scoreProcessorStatistics, DateTimeOffset receivedTime)
         {
             TotalScore = totalScore;
             Accuracy = accuracy;
diff --git a/osu.Game/Rulesets/Scoring/ScoreProcessor.cs b/osu.Game/Rulesets/Scoring/ScoreProcessor.cs
index f2b1607f5e..013dd4b8e7 100644
--- a/osu.Game/Rulesets/Scoring/ScoreProcessor.cs
+++ b/osu.Game/Rulesets/Scoring/ScoreProcessor.cs
@@ -5,6 +5,7 @@ using System;
 using System.Collections.Generic;
 using System.Diagnostics;
 using System.Linq;
+using MessagePack;
 using osu.Framework.Bindables;
 using osu.Framework.Localisation;
 using osu.Game.Beatmaps;
@@ -397,29 +398,29 @@ namespace osu.Game.Rulesets.Scoring
             scoreResultCounts.Clear();
             scoreResultCounts.AddRange(frame.Header.Statistics);
 
-            ReadScoreProcessorStatistics(frame.Header.ScoreProcessorStatistics);
+            SetScoreProcessorStatistics(frame.Header.ScoreProcessorStatistics);
 
             updateScore();
 
             OnResetFromReplayFrame?.Invoke();
         }
 
-        public virtual void WriteScoreProcessorStatistics(IDictionary<string, object> statistics)
+        public ScoreProcessorStatistics GetScoreProcessorStatistics() => new ScoreProcessorStatistics
         {
-            statistics.Add(nameof(currentMaximumBaseScore), currentMaximumBaseScore);
-            statistics.Add(nameof(currentBaseScore), currentBaseScore);
-            statistics.Add(nameof(currentCountBasicJudgements), currentCountBasicJudgements);
-            statistics.Add(nameof(currentComboPortion), currentComboPortion);
-            statistics.Add(nameof(currentBonusPortion), currentBonusPortion);
-        }
+            MaximumBaseScore = currentMaximumBaseScore,
+            BaseScore = currentBaseScore,
+            CountBasicJudgements = currentCountBasicJudgements,
+            ComboPortion = currentComboPortion,
+            BonusPortion = currentBonusPortion
+        };
 
-        public virtual void ReadScoreProcessorStatistics(IReadOnlyDictionary<string, object> statistics)
+        public void SetScoreProcessorStatistics(ScoreProcessorStatistics statistics)
         {
-            currentMaximumBaseScore = (double)statistics.GetValueOrDefault(nameof(currentMaximumBaseScore), 0);
-            currentBaseScore = (double)statistics.GetValueOrDefault(nameof(currentBaseScore), 0);
-            currentCountBasicJudgements = (int)statistics.GetValueOrDefault(nameof(currentCountBasicJudgements), 0);
-            currentComboPortion = (double)statistics.GetValueOrDefault(nameof(currentComboPortion), 0);
-            currentBonusPortion = (double)statistics.GetValueOrDefault(nameof(currentBonusPortion), 0);
+            currentMaximumBaseScore = statistics.MaximumBaseScore;
+            currentBaseScore = statistics.BaseScore;
+            currentCountBasicJudgements = statistics.CountBasicJudgements;
+            currentComboPortion = statistics.ComboPortion;
+            currentBonusPortion = statistics.BonusPortion;
         }
 
         #region Static helper methods
@@ -493,4 +494,24 @@ namespace osu.Game.Rulesets.Scoring
         [LocalisableDescription(typeof(GameplaySettingsStrings), nameof(GameplaySettingsStrings.ClassicScoreDisplay))]
         Classic
     }
+
+    [Serializable]
+    [MessagePackObject]
+    public class ScoreProcessorStatistics
+    {
+        [Key(0)]
+        public double MaximumBaseScore { get; set; }
+
+        [Key(1)]
+        public double BaseScore { get; set; }
+
+        [Key(2)]
+        public int CountBasicJudgements { get; set; }
+
+        [Key(3)]
+        public double ComboPortion { get; set; }
+
+        [Key(4)]
+        public double BonusPortion { get; set; }
+    }
 }