Officials have launched an investigation this week into at least two Wimbledon matches after bookmakers detected "possible" suspicious betting patterns, reports say. 

The International Tennis Integrity Agency (ITIA), which was established back in January, told Reuters on Wednesday that bookies flagged two instances of "irregular betting patterns" during this month’s Grand Slam. 

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"Two alerts (were) provided to us during the Championships from the betting industry indicating possible irregular betting patterns," the agency said. "We are not able to comment on the detail of these while they are being looked into."

One of the matches allegedly being investigated is a first-round men’s doubles match where large bets were placed at "irregular times," CBS Sports reported, citing a German newspaper. The second match in question is a singles match against an unnamed German player. The probe focuses on the opponent of the player and large spot-on wagers that materialized. 

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The only two German players that competed in the men’s singles were Dominik Koepfer, who advanced to the third round before losing 7-5, 6-1, 6-7, to Spain’s Roberto Bautista Agut, and Yannick Hanfmann, who lost in the first round 6-1, 7-5, 7-6 to Jiri Vesely.

The only player that competed in the women’s singles event was Laura Siegemund who lost in the first round to Russia’s Ekaterina Alexandrova. 

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"It is important to note that an alert on its own is not evidence of match-fixing. Where analysis of a match alert does suggest corrupt activity, the ITIA conducts a full and confidential investigation," the ITIA said.