Greatwich was then a last-minute addition to the 2010 AFF Suzuki Cup in Vietnam despite not featuring in the qualifiers in Laos. In their first group game against Singapore, Greatwich scored an injury time equaliser to produce one of the biggest shocks in AFF Suzuki Cup history. Greatwich and the team went one better in the following game against defending champions Vietnam, when Greatwich scored a goal and an assist on Phil Younghusband's goal to win 2–0. Following a 0–0 draw in the final group game against Myanmar, the Philippines were matched up against Indonesia in the semi-finals. Both games were played in Jakarta following the ASEAN Football Federation's decision that the Philippines had no suitable venue to host the semi-finals, and lost both games 1–0. Greatwich suffered the misfortune of being sent-off in the final moments of the second leg.