As reported by Portuguese newspaper A Bola, the Colombian international has asked Porto for a couple of extra days holiday. He was due to report to Porto this week after an extended leave following Colombia's World Cup exit to Brazil at the quarter-final stage.
Wenger on the lookout
During the tournament Martinez admitted that he would jump at the chance to move to boyhood club Arsenal, sparking speculation that Arsene Wenger, who was in Brazil to cover the World Cup for French TV, would make a bid.
The Arsenal boss reportedly had his eye on the likes of Mario Balotelli, Mario Mandzukic and Martinez as he looks to bolster his front-line ahead of the new season.
Mandzukic has since completed a move to Atletico Madrid, but Martinez remains a possible target. The 27-year-old forward has an impressive goals record in Portugal, 46 in 60 league appearances, and found the net at the World Cup despite not being first choice for Colombia.
Premier League interest
At various points in his career the likes of Manchester United and Chelsea have also been linked, with the Premier League thought to be his most likely destination should he decide to leave Porto. The Portuguese giants reportedly have a £35m release clause in Martinez's contract, which means he won't come cheap.
Arsenal makes sense
Arsenal would make the most sense at this stage, even despite the fact that the player himself is a Gunners fan. Wenger needs competition for Olivier Giroud, while Jose Mourinho recently signed Diego Costa from Atletico Madrid and Louis Van Gaal has Robin Van Persie and Wayne Rooney at Old Trafford.
Considering the transfer rumours surrounding the player, the timing of the request by Martinez is interesting. The report even goes on to claim that he may not return until July 28th, which means he would miss an important preseason friendly against St Etienne.