<p>Former world number one Ana Ivanovic suffered a first round defeat at the US Open on Tuesday but insisted she is not about to follow football star husband Bastian Schweinsteiger into international retirement.<br /><br /></p>.<p>The 2008 French Open champion did admit, however, that she would be forced to "reassess" her faltering career after giving up a 5-3 lead and squandering a set point before losing 7-6 (7/4), 6-1 to Denisa Allertova at the Flushing Meadows.<br /><br />The 28-year-old has not won a match since making the quarterfinals at Mallorca in June. Since then she has lost in the first round at Wimbledon, the Olympics and Cincinnati with her confidence not helped by a wrist injury.<br /><br />"I really feel like I have to reassess because I have been putting so many hours on court and in the gym in particular, trying to get my body healthy," the Serb star said after a performance that included 41 unforced errors.<br /><br />"It's been very frustrating not getting anything in return, because I really feel like I invested my heart."<br /><br />Tuesday's loss was also Ivanovic's second successive first round exit in New York.Twelve months ago, she lost her opener to Dominika Cibulkova. Her best performance remains a run to the quarterfinals in 2012.<br /><br />Ivanovic married Manchester United star Schweinsteiger in Venice just after Wimbledon. On Wednesday, the 32-year-old footballer will play his 121st and last international for Germany against Finland in Moenchengladbach.<br /><br />Ivanovic, now ranked at 31 in the world and slipping towards her worst end-of-season position in 11 years, said she will follow the game on television, but will not be tempted to also draw the curtain down on her career.<br /><br />"No, not at all. I just need to really see why this is happening," she explained."I mean I had struggles throughout my career; I had some tough times. This is not the first time I'm going through this. It just hurts because I know what I invested."<br /><br />"I feel like I have the potential and game, but it hasn't really been coming together. I had four people travelling with me trying to make sure I'm on the right path and doing the right things.<br /><br />"Before when I travelled with one or two people I was doing much better. These are the things I have to think about."<br /><br />Further, Ivanovic said: “I had that set point, you know, and I went for my big forehand and it was quite a bad miss because I was a little bit in two minds on what to do with it.”<br /><br />''I tried to go less for it because I tried to make less errors,'' she said. ''Basically, I ended up making more.''<br /><br />Allertova, meanwhile, goes on to face either Italy's Karin Knapp or Johanna Larsson of Sweden for a place in the last 32. The 23-year-old Czech, ranked at 89 in the world, also made the second round last year where she went out to eventual runner-up Roberta Vinci.</p>
<p>Former world number one Ana Ivanovic suffered a first round defeat at the US Open on Tuesday but insisted she is not about to follow football star husband Bastian Schweinsteiger into international retirement.<br /><br /></p>.<p>The 2008 French Open champion did admit, however, that she would be forced to "reassess" her faltering career after giving up a 5-3 lead and squandering a set point before losing 7-6 (7/4), 6-1 to Denisa Allertova at the Flushing Meadows.<br /><br />The 28-year-old has not won a match since making the quarterfinals at Mallorca in June. Since then she has lost in the first round at Wimbledon, the Olympics and Cincinnati with her confidence not helped by a wrist injury.<br /><br />"I really feel like I have to reassess because I have been putting so many hours on court and in the gym in particular, trying to get my body healthy," the Serb star said after a performance that included 41 unforced errors.<br /><br />"It's been very frustrating not getting anything in return, because I really feel like I invested my heart."<br /><br />Tuesday's loss was also Ivanovic's second successive first round exit in New York.Twelve months ago, she lost her opener to Dominika Cibulkova. Her best performance remains a run to the quarterfinals in 2012.<br /><br />Ivanovic married Manchester United star Schweinsteiger in Venice just after Wimbledon. On Wednesday, the 32-year-old footballer will play his 121st and last international for Germany against Finland in Moenchengladbach.<br /><br />Ivanovic, now ranked at 31 in the world and slipping towards her worst end-of-season position in 11 years, said she will follow the game on television, but will not be tempted to also draw the curtain down on her career.<br /><br />"No, not at all. I just need to really see why this is happening," she explained."I mean I had struggles throughout my career; I had some tough times. This is not the first time I'm going through this. It just hurts because I know what I invested."<br /><br />"I feel like I have the potential and game, but it hasn't really been coming together. I had four people travelling with me trying to make sure I'm on the right path and doing the right things.<br /><br />"Before when I travelled with one or two people I was doing much better. These are the things I have to think about."<br /><br />Further, Ivanovic said: “I had that set point, you know, and I went for my big forehand and it was quite a bad miss because I was a little bit in two minds on what to do with it.”<br /><br />''I tried to go less for it because I tried to make less errors,'' she said. ''Basically, I ended up making more.''<br /><br />Allertova, meanwhile, goes on to face either Italy's Karin Knapp or Johanna Larsson of Sweden for a place in the last 32. The 23-year-old Czech, ranked at 89 in the world, also made the second round last year where she went out to eventual runner-up Roberta Vinci.</p>