16 september 1998
FC Porto - Olympiakos Piraeus 2-2
Score: 65. Zahovic 1-0, 82. Jardel 2-0, 86. Yannakopoulos 2-1, 90. Gogic 2-2.
Toeschouwers: 37.000, scheidsrechter: Veissičre (Frankrijk).
Geel: Secretário, Jorge Costa, Zahovic (FC Porto), Georgatos, Poursanidis, Ofori-Quaye (Olympiakos Piraeus).
FC Porto: Kralj; Secretário, Aloísio, Jorge Costa, Fernando Mendes; Paulinho Santos, Doriva, Zahovic (70. Chippo), Drulovic (59. Artur); Capucho, Jardel (90. Panduru).
Olympiakos Piraeus: Eleftheopoulos; Mavrogenidis, Anatolakis, Karataidis, Georgatos; Luciano (87. Gogic), Amanatidis (83. Karapialis), Poursanidis, Djordjevic; Ofori-Quaye, Ivic (79. Yannakopoulos).

Croatia Zagreb - Ajax 0-0

Ajax - FC Porto 2-1

30 september 1998
Olympiakos Piraeus - Croatia Zagreb 2-0
Score: 21. Alexandris 1-0, 80. Gogic 2-0.
Toeschouwers: 60.000, scheidsrechter: Elleray (Engeland).
Geel: Mavrogenidis, Amanatidis, Alexandris (Olympiakos Piraeus), D. Šimic (Croatia Zagreb).
Olympiakos Piraeus: Eleftheropoulos; Mavrogenidis, Anatolakis, Karataidis, Karapialis (72. Niniadis); Yannakopoulos, Amanatidis (75. Antzas), Poursanidis, Djordjevic; Alexandris (90. Luciano), Gogic.
Croatia Zagreb: Ladic; Tokic, Juric, D. Šimic; Rukavina, Jurcic, Jelicic (74. Šokota), Mujcin (46. Sabic), Cvitanovic; Maric, Viduka (81. J. Šimic).

21 oktober 1998
Olympiakos Piraeus - Ajax 1-0
Score: 39. Alexandris 1-0.
Toeschouwers: 74.700, scheidsrechter: Diaz Vega (Spanje).
Geel: Armanatidis, Poursanidis, Georgatos, Yannakopoulos, Gogic (Olympiakos Piraeus), Rudy, Wamberto (Ajax).
Olympiakos Piraeus: Eleftheropoulos; Amanatidis, Anatolakis, Karataidis, Poursanidis; Djordjevic, Karapialis (86. Niniadis), Georgatos, Uannakopoulos; Alexandris (69. Passalis), Gogic.
Ajax: Van der Sar; Tobiasen, Rudy, Oliseh, F. de Boer; R. de Boer, Litmanen, Witschge; Wamberto (46. Dani), Arveladze (79. McCarthy), Grřnkjćr (46. Kinkladze).

21 oktober 1998
FC Porto - Croatia Zagreb 3-0
Score: 33. Doriva 1-0, 43. Zahovic 2-0, 75. Zahovic 3-0.
Toeschouwers: 20.000, scheidsrechter: Benkö (Oostenrijk).
Geel: Jorge Costa (FC Porto), Krznar, Mujcin (Croatia Zagreb).
FC Porto: Kralj; Secretário, Aloísio, Jorge Costa, Fernando Mendes; Paulinho Santos, Doriva, Zahovic (90. Chippo), Drulovic (63. Artur); Capucho (80. Rui Barros), Jardel.
Croatia Zagreb: Ladic; Tokic, Juric, D. Šimic; Krznar, Rukavina, Jurcic, Jelicic (46. Mujcin), Šaric (46. Sabic); Maric (58. Viduka), Šokota.

Ajax - Olympiakos Piraeus 2-0

4 november 1998
Croatia Zagreb - FC Porto 3-1
Score: 7. Mikic 1-0, 37. Rukavina 2-0, 39. Jardel 2-1, 61. Mujcin 3-1.
Toeschouwers: 10.000, scheidsrechter: Merk (Duitsland).
Geel: Mujcin, Jelicic, Mikic (Croatia Zagreb), Aloísio, Paulinho Santos, Capucho (FC Porto).
Croatia Zagreb: Ladic; Tokic, Juric, D. Šimic; Maric (55. J. Šimic), Krznar (46. Biscan), Rukavina, Mujcin, Jelicic; Saric (75. Cvitanovic), Mikic.
FC Porto: Kralj; Secretário, Aloísio (75. Mielcarski), Joăo Pinto, Fernando Mendes (75. Chippo); Paulinho Santos, Doriva, Zahovic, Drulovic; Capucho, Rui Barros (27. Jardel).

25 november 1998
Ajax - Croatia Zagreb 0-1
Score: 68. J. Šimic 0-1.
Toeschouwers: 47.000, scheidsrechter: Batta (Frankrijk).
Geel: R. de Boer, Dani (Ajax), Krznar (Croatia Zagreb).
Ajax: Van der Sar; Mensah, Blind, F. de Boer, Sier (42. Melchiot); R. de Boer, Dani, Witschge; Wamberto (73. Babangida), Hosé (64. McCarthy), Hoekstra.
Croatia Zagreb: Ladic; Tokic, Juric, Krznar (46. Jurcic); Biscan, D. Šimic, Šaric (54. J. Šimic), Cvitanovic, Rukavina (81. Sabic); Jelicic, Maric.

25 november 1998
Olympiakos Piraeus - FC Porto 2-1
Score: 18. Gogic 1-0, 54. Djordjevic 2-0, 76. Zahovic 2-1.
Toeschouwers: 70.000, scheidsrechter: Dallas (Schotland).
Geel: Anatolakis, Djordjevic, Karapialis (Olympiakos Piraeus), Secretário, Fernando Mendes, Doriva, Capucho (FC Porto). Rood: 84. Antzas (Olympiakos Piraeus).
Olympiakos Piraeus: Eleftheropoulos; Mavrogenidis, Anatolakis, Poursanidis, Yannakopoulos (54. Passalis); Djordjevic, Karapialis (70. Antzas), Georgatos (83. De Sousa); Alexandris, Gogic.
FC Porto: Rui Correia; Secretário, Jorge Costa, Aloísio, Fernando Mendes (87. Joăo Pinto); Chainho (53. Rui Barros), Doriva, Zahovic, Drulovic; Capucho (63. Feher), Jardel.

FC Porto - Ajax 3-0

9 december 1998
Croatia Zagreb - Olympiakos Piraeus 1-1
Score: 35. Jelicic 1-0, 64. Yannakopoulos 1-1.
Toeschouwers: 25.000, scheidsrechter: Pedersen (Noorwegen).
Geel: D. Šimic (Croatia Zagreb).
Croatia Zagreb: Ladic; Tokic, Juric, Mikic (82. Abramovic); Biscan (69. J. Šimic), D. Šimic, Šaric, Mujcin; Jelicic (87. Jurcic), Maric.
Olympiakos Piraeus: Eleftheropoulos; Mavrogenidis, Anatolakis, Karataidis, Poursanidis; Amanatidis, Yannakopoulos (80. Alexandris), Djordjevic (62. De Souza), Niniadis; Georgatos, Gogic (85. Ofori-Quaye).

Ajax (Nederland)
FC Porto (Portugal)
Olympiakos Piraeus (Griekenland)
Croatia Zagreb (Kroatië)

Wedstrijden:

FC Porto - Olymiakos Piraeus 2-2
Croatia Zagreb - Ajax 0-0
Ajax - FC Porto 2-1
Olympiakos Piraeus - Croatia Zagreb 2-0
Olympiakos Piraeus - Ajax 1-0
FC Porto - Croatia Zagreb 3-0
Ajax - Olympiakos Piraeus 2-0
Croatia Zagreb - FC Porto 3-1
Ajax - Croatia Zagreb 0-1
Olympiakos Piraeus - FC Porto 2-1
FC Porto - Ajax 3-0
Croatia Zagreb - Olympiakos Piraeus 1-1

                          AJA CRO OLY POR
Ajax (Ned)                xxx 0-1 2-0 2-1
Croatia Zagreb (Kro)      0-0 xxx 1-1 3-1
Olympiakos Piraeus (Gri)  1-0 2-0 xxx 2-1
FC Porto (Por)            3-0 3-0 2-2 xxx