Manchester United manager Jose Mourinho has hailed Manchester City’s recent success after being questioned on financial practices.
Their rivals have been in the news this week over the story published by football leaks in German newspaper Die Spiegel, which claimed the Abu Dhabi-backed club breached Financial Fair Play rules.
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Mourinho spoke about the upcoming Manchester Derby at Etihad and was unwilling to comment on the issue about Manchester City but the former Chelsea manager saved some positive comments for United's local rivals.
"It is difficult for me to answer because I focus on my job," Mourinho said. "I focus on football.
"If you want to speak about their football potential, football potential starts with investment.
"After that, of course, there is the quality of the work and the quality of the organisation and I think that is untouchable.
"But what is behind [it] I cannot say.”
Manchester United defeated Manchester City in the last 3-2 the last time they met at the Etihad Stadium.