The 2018 Malaysia Cup knockout stage began on 21 September 2018 and concluded on 27 October 2018 with the final at Shah Alam Stadium in Shah Alam, to decide the champions of the 2018 Malaysia Cup. A total of 8 teams competed in the knockout phase.

The knockout phase involves the eight teams which qualified as winners and runners-up of each of the four groups in the group stage.

Group	Winners (Seeded in quarter final draw)	Runners-up (Unseeded in quarter final draw)
A	Terengganu	Perak
B	PKNS	FELDA United
C	Johor Darul Ta'zim	Kelantan
D	Sabah	Pahang

The knockout phase involved the eight teams which qualified as winners and runners-up of each of the eight groups in the group stage.

Each tie in the knockout phase, apart from the final, was played over two legs, with each team playing one leg at home. The team that scored more goals on aggregate over the two legs advanced to the next round. If the aggregate score was level, the away goals rule was applied, i.e. the team that scored more goals away from home over the two legs advanced. If away goals were also equal, then thirty minutes of extra time was played. The away goals rule was again applied after extra time, i.e. if there were goals scored during extra time and the aggregate score was still level, the visiting team advanced by virtue of more away goals scored. If no goals were scored during extra time, the tie was decided by penalty shoot-out. In the final, which was played as a single match, if scores were level at the end of normal time, extra time was played, followed by penalty shoot-out if scores remained tied.

The mechanism of the draws for each round was as follows:

• In the draw for the quarter-final, the four group winners were seeded, and the four group runners-up were unseeded. The seeded teams were drawn against the unseeded teams, with the seeded teams hosting the second leg. Teams from the same group or the same association could not be drawn against each other.
• In the draws for the quarter-finals onwards, there were no seedings, and teams from the same group or the same association could be drawn against each other.

The schedule was as follows (all draws were held at the Damansara Performing Arts Centre in Petaling Jaya).^[1]

Round	Draw date and time	First leg	Second leg
Quarter-finals	30 July 2018, 15:30 UTC+8	21–23 & 25 September 2018	28–30 September 2018
Semi-finals		6–7 October 2018	20–21 October 2017
Final		27 October 2018 at Shah Alam Stadium, Shah Alam

	Quarter-finals							Semi-finals							Final
	B2	FELDA United	1	3	4
	A1	Terengganu	2	4	6
									Terengganu	1	2	3
									Johor Darul Ta'zim	0	2	2
	D2	Pahang	1	0	1
	C1	Johor Darul Ta'zim	1	2	3
																Terengganu	3 (1)
																Perak	3 (4)
	A2	Perak	0	2	2
	B1	PKNS	0	0	0
									Perak	5	2	7
									Sabah	0	2	2
	C2	Kelantan	2	0	2
	D1	Sabah (a)	1	1	2

The first legs were played on 21, 22, 23 & 25 September, and the second legs were played on 28, 29 and 30 September 2018.

Team 1	Agg.Tooltip Aggregate score	Team 2	1st leg	2nd leg
FELDA United	4–6	Terengganu	1–2	3–4
Kelantan	2–2 (a)	Sabah	2–1	0–1
Pahang	1–3	Johor Darul Ta'zim	1–1	0–2
Perak	2–0	PKNS	0–0	2–0

First leg

Second leg

Terengganu won 6–4 on aggregate.

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First leg

Second leg

2–2 on aggregate. Sabah won on away goals.

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First leg

Second leg

Johor Darul Ta'zim won 3–1 on aggregate.

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First leg

Second leg

Perak won 2–0 on aggregate.

The first legs were played on 6 and 7 October, and the second legs were played on 20 and 21 October 2018.

Team 1	Agg.Tooltip Aggregate score	Team 2	1st leg	2nd leg
Terengganu	3–2	Johor Darul Ta'zim	1–0	2–2
Perak	7–2	Sabah	5–0	2–2

First leg

Second leg

Terengganu won 3–2 on aggregate.

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First leg

Second leg

Perak won 7–2 on aggregate.

The final was played on 27 October 2018 at the Shah Alam Stadium in Shah Alam.

• Football Malaysia Official Website - (Malaysia Cup)